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Finding the Fourth Proportional to 129,079.83, 178,128.87 and 70,937.52

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Solution

The fourth proportional to 129,079.83, 178,128.87 and 70,937.52 is: 97,893.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,079.83 : 178,128.87 = 70,937.52 : x
  2. Step 2: Convert to fraction form
    129,079.83/178,128.87 = 70,937.52/x
  3. Step 3: Cross multiply
    129,079.83x = 178,128.87 × 70,937.52
  4. Step 4: Simplify right side
    129,079.83x = 12,636,020,012.19
  5. Step 5: Solve for x
    x = 12,636,020,012.19/129,079.83
  6. Step 6: Final answer
    x = 97,893.07

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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.