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Finding the Fourth Proportional to 129,791, 179,111.58 and 70,175

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Solution

The fourth proportional to 129,791, 179,111.58 and 70,175 is: 96,841.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,791 : 179,111.58 = 70,175 : x
  2. Step 2: Convert to fraction form
    129,791/179,111.58 = 70,175/x
  3. Step 3: Cross multiply
    129,791x = 179,111.58 × 70,175
  4. Step 4: Simplify right side
    129,791x = 12,569,155,126.50
  5. Step 5: Solve for x
    x = 12,569,155,126.50/129,791
  6. Step 6: Final answer
    x = 96,841.50

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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.