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Finding the Fourth Proportional to 156,729.90, 235,116.45 and 56,865.90

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Solution

The fourth proportional to 156,729.90, 235,116.45 and 56,865.90 is: 85,306.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,729.90 : 235,116.45 = 56,865.90 : x
  2. Step 2: Convert to fraction form
    156,729.90/235,116.45 = 56,865.90/x
  3. Step 3: Cross multiply
    156,729.90x = 235,116.45 × 56,865.90
  4. Step 4: Simplify right side
    156,729.90x = 13,370,108,534.06
  5. Step 5: Solve for x
    x = 13,370,108,534.06/156,729.90
  6. Step 6: Final answer
    x = 85,306.69

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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.