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Finding the Fourth Proportional to 64,920.80, 97,352.40 and 29,871.20

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Solution

The fourth proportional to 64,920.80, 97,352.40 and 29,871.20 is: 44,793.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,920.80 : 97,352.40 = 29,871.20 : x
  2. Step 2: Convert to fraction form
    64,920.80/97,352.40 = 29,871.20/x
  3. Step 3: Cross multiply
    64,920.80x = 97,352.40 × 29,871.20
  4. Step 4: Simplify right side
    64,920.80x = 2,908,033,010.88
  5. Step 5: Solve for x
    x = 2,908,033,010.88/64,920.80
  6. Step 6: Final answer
    x = 44,793.55

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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.