Home / 129,688.05-178,965.93-72,329.13

Finding the Fourth Proportional to 129,688.05, 178,965.93 and 72,329.13

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Solution

The fourth proportional to 129,688.05, 178,965.93 and 72,329.13 is: 99,812.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,688.05 : 178,965.93 = 72,329.13 : x
  2. Step 2: Convert to fraction form
    129,688.05/178,965.93 = 72,329.13/x
  3. Step 3: Cross multiply
    129,688.05x = 178,965.93 × 72,329.13
  4. Step 4: Simplify right side
    129,688.05x = 12,944,450,016.54
  5. Step 5: Solve for x
    x = 12,944,450,016.54/129,688.05
  6. Step 6: Final answer
    x = 99,812.20

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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.