Home / 128,521,028.52-177,357,204.99-72,765,011.16

Finding the Fourth Proportional to 128,521,028.52, 177,357,204.99 and 72,765,011.16

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Solution

The fourth proportional to 128,521,028.52, 177,357,204.99 and 72,765,011.16 is: 100,414,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,521,028.52 : 177,357,204.99 = 72,765,011.16 : x
  2. Step 2: Convert to fraction form
    128,521,028.52/177,357,204.99 = 72,765,011.16/x
  3. Step 3: Cross multiply
    128,521,028.52x = 177,357,204.99 × 72,765,011.16
  4. Step 4: Simplify right side
    128,521,028.52x = 12,905,399,000,403,758
  5. Step 5: Solve for x
    x = 12,905,399,000,403,758/128,521,028.52
  6. Step 6: Final answer
    x = 100,414,688.16

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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.