Home / 129,010.05-178,033.86-72,421.38

Finding the Fourth Proportional to 129,010.05, 178,033.86 and 72,421.38

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Solution

The fourth proportional to 129,010.05, 178,033.86 and 72,421.38 is: 99,941.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,010.05 : 178,033.86 = 72,421.38 : x
  2. Step 2: Convert to fraction form
    129,010.05/178,033.86 = 72,421.38/x
  3. Step 3: Cross multiply
    129,010.05x = 178,033.86 × 72,421.38
  4. Step 4: Simplify right side
    129,010.05x = 12,893,457,827.93
  5. Step 5: Solve for x
    x = 12,893,457,827.93/129,010.05
  6. Step 6: Final answer
    x = 99,941.50

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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.