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Finding the Fourth Proportional to 129,652, 178,915.28 and 73,060

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Solution

The fourth proportional to 129,652, 178,915.28 and 73,060 is: 100,820.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,652 : 178,915.28 = 73,060 : x
  2. Step 2: Convert to fraction form
    129,652/178,915.28 = 73,060/x
  3. Step 3: Cross multiply
    129,652x = 178,915.28 × 73,060
  4. Step 4: Simplify right side
    129,652x = 13,071,550,356.80
  5. Step 5: Solve for x
    x = 13,071,550,356.80/129,652
  6. Step 6: Final answer
    x = 100,820.28

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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.