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Finding the Fourth Proportional to 113,000.52, 156,102.72 and 90,309.72

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Solution

The fourth proportional to 113,000.52, 156,102.72 and 90,309.72 is: 124,756.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,000.52 : 156,102.72 = 90,309.72 : x
  2. Step 2: Convert to fraction form
    113,000.52/156,102.72 = 90,309.72/x
  3. Step 3: Cross multiply
    113,000.52x = 156,102.72 × 90,309.72
  4. Step 4: Simplify right side
    113,000.52x = 14,097,592,934.44
  5. Step 5: Solve for x
    x = 14,097,592,934.44/113,000.52
  6. Step 6: Final answer
    x = 124,756.89

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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.