Home / 129,320.89-178,461.08-72,732.27

Finding the Fourth Proportional to 129,320.89, 178,461.08 and 72,732.27

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Solution

The fourth proportional to 129,320.89, 178,461.08 and 72,732.27 is: 100,369.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,320.89 : 178,461.08 = 72,732.27 : x
  2. Step 2: Convert to fraction form
    129,320.89/178,461.08 = 72,732.27/x
  3. Step 3: Cross multiply
    129,320.89x = 178,461.08 × 72,732.27
  4. Step 4: Simplify right side
    129,320.89x = 12,979,878,199.08
  5. Step 5: Solve for x
    x = 12,979,878,199.08/129,320.89
  6. Step 6: Final answer
    x = 100,369.54

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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.