Home / 128,929.06-177,925.17-72,344.62

Finding the Fourth Proportional to 128,929.06, 177,925.17 and 72,344.62

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Solution

The fourth proportional to 128,929.06, 177,925.17 and 72,344.62 is: 99,837.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,929.06 : 177,925.17 = 72,344.62 : x
  2. Step 2: Convert to fraction form
    128,929.06/177,925.17 = 72,344.62/x
  3. Step 3: Cross multiply
    128,929.06x = 177,925.17 × 72,344.62
  4. Step 4: Simplify right side
    128,929.06x = 12,871,928,812.09
  5. Step 5: Solve for x
    x = 12,871,928,812.09/128,929.06
  6. Step 6: Final answer
    x = 99,837.30

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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.