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Finding the Fourth Proportional to 113,459.40, 156,560.04 and 65,702.88

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Solution

The fourth proportional to 113,459.40, 156,560.04 and 65,702.88 is: 90,661.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,459.40 : 156,560.04 = 65,702.88 : x
  2. Step 2: Convert to fraction form
    113,459.40/156,560.04 = 65,702.88/x
  3. Step 3: Cross multiply
    113,459.40x = 156,560.04 × 65,702.88
  4. Step 4: Simplify right side
    113,459.40x = 10,286,445,520.92
  5. Step 5: Solve for x
    x = 10,286,445,520.92/113,459.40
  6. Step 6: Final answer
    x = 90,661.91

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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.