Home / 129,431.79-178,614.32-72,071.24

Finding the Fourth Proportional to 129,431.79, 178,614.32 and 72,071.24

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Solution

The fourth proportional to 129,431.79, 178,614.32 and 72,071.24 is: 99,457.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,431.79 : 178,614.32 = 72,071.24 : x
  2. Step 2: Convert to fraction form
    129,431.79/178,614.32 = 72,071.24/x
  3. Step 3: Cross multiply
    129,431.79x = 178,614.32 × 72,071.24
  4. Step 4: Simplify right side
    129,431.79x = 12,872,954,270.73
  5. Step 5: Solve for x
    x = 12,872,954,270.73/129,431.79
  6. Step 6: Final answer
    x = 99,457.44

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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.