Home / 128,547,237.76-177,420,936-76,365,262.24

Finding the Fourth Proportional to 128,547,237.76, 177,420,936 and 76,365,262.24

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Solution

The fourth proportional to 128,547,237.76, 177,420,936 and 76,365,262.24 is: 105,399,357.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547,237.76 : 177,420,936 = 76,365,262.24 : x
  2. Step 2: Convert to fraction form
    128,547,237.76/177,420,936 = 76,365,262.24/x
  3. Step 3: Cross multiply
    128,547,237.76x = 177,420,936 × 76,365,262.24
  4. Step 4: Simplify right side
    128,547,237.76x = 13,548,796,304,506,256
  5. Step 5: Solve for x
    x = 13,548,796,304,506,256/128,547,237.76
  6. Step 6: Final answer
    x = 105,399,357.78

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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.