Home / 129,521.78-178,727.84-72,155.25

Finding the Fourth Proportional to 129,521.78, 178,727.84 and 72,155.25

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Solution

The fourth proportional to 129,521.78, 178,727.84 and 72,155.25 is: 99,567.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,521.78 : 178,727.84 = 72,155.25 : x
  2. Step 2: Convert to fraction form
    129,521.78/178,727.84 = 72,155.25/x
  3. Step 3: Cross multiply
    129,521.78x = 178,727.84 × 72,155.25
  4. Step 4: Simplify right side
    129,521.78x = 12,896,151,616.38
  5. Step 5: Solve for x
    x = 12,896,151,616.38/129,521.78
  6. Step 6: Final answer
    x = 99,567.44

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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.