Home / 128,290.91-177,040.28-70,934.20

Finding the Fourth Proportional to 128,290.91, 177,040.28 and 70,934.20

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Solution

The fourth proportional to 128,290.91, 177,040.28 and 70,934.20 is: 97,888.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,290.91 : 177,040.28 = 70,934.20 : x
  2. Step 2: Convert to fraction form
    128,290.91/177,040.28 = 70,934.20/x
  3. Step 3: Cross multiply
    128,290.91x = 177,040.28 × 70,934.20
  4. Step 4: Simplify right side
    128,290.91x = 12,558,210,364.31
  5. Step 5: Solve for x
    x = 12,558,210,364.31/128,290.91
  6. Step 6: Final answer
    x = 97,888.55

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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.