Home / 128,547,313.76-177,421,040.88-76,365,338.24

Finding the Fourth Proportional to 128,547,313.76, 177,421,040.88 and 76,365,338.24

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Solution

The fourth proportional to 128,547,313.76, 177,421,040.88 and 76,365,338.24 is: 105,399,462.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547,313.76 : 177,421,040.88 = 76,365,338.24 : x
  2. Step 2: Convert to fraction form
    128,547,313.76/177,421,040.88 = 76,365,338.24/x
  3. Step 3: Cross multiply
    128,547,313.76x = 177,421,040.88 × 76,365,338.24
  4. Step 4: Simplify right side
    128,547,313.76x = 13,548,817,797,694,066
  5. Step 5: Solve for x
    x = 13,548,817,797,694,066/128,547,313.76
  6. Step 6: Final answer
    x = 105,399,462.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.