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Finding the Fourth Proportional to 129,638.50, 178,916.97 and 73,060.18

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Solution

The fourth proportional to 129,638.50, 178,916.97 and 73,060.18 is: 100,831.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,638.50 : 178,916.97 = 73,060.18 : x
  2. Step 2: Convert to fraction form
    129,638.50/178,916.97 = 73,060.18/x
  3. Step 3: Cross multiply
    129,638.50x = 178,916.97 × 73,060.18
  4. Step 4: Simplify right side
    129,638.50x = 13,071,706,033.25
  5. Step 5: Solve for x
    x = 13,071,706,033.25/129,638.50
  6. Step 6: Final answer
    x = 100,831.98

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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.