Home / 156,915.90-235,373.85-51,721.20

Finding the Fourth Proportional to 156,915.90, 235,373.85 and 51,721.20

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Solution

The fourth proportional to 156,915.90, 235,373.85 and 51,721.20 is: 77,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,915.90 : 235,373.85 = 51,721.20 : x
  2. Step 2: Convert to fraction form
    156,915.90/235,373.85 = 51,721.20/x
  3. Step 3: Cross multiply
    156,915.90x = 235,373.85 × 51,721.20
  4. Step 4: Simplify right side
    156,915.90x = 12,173,817,970.62
  5. Step 5: Solve for x
    x = 12,173,817,970.62/156,915.90
  6. Step 6: Final answer
    x = 77,581.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.