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Finding the Fourth Proportional to 113,221.50, 156,245.76 and 62,920.50

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Solution

The fourth proportional to 113,221.50, 156,245.76 and 62,920.50 is: 86,830.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,221.50 : 156,245.76 = 62,920.50 : x
  2. Step 2: Convert to fraction form
    113,221.50/156,245.76 = 62,920.50/x
  3. Step 3: Cross multiply
    113,221.50x = 156,245.76 × 62,920.50
  4. Step 4: Simplify right side
    113,221.50x = 9,831,061,342.08
  5. Step 5: Solve for x
    x = 9,831,061,342.08/113,221.50
  6. Step 6: Final answer
    x = 86,830.34

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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.