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Finding the Fourth Proportional to 64,913.80, 97,370.70 and 42,752.20

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Solution

The fourth proportional to 64,913.80, 97,370.70 and 42,752.20 is: 64,128.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,913.80 : 97,370.70 = 42,752.20 : x
  2. Step 2: Convert to fraction form
    64,913.80/97,370.70 = 42,752.20/x
  3. Step 3: Cross multiply
    64,913.80x = 97,370.70 × 42,752.20
  4. Step 4: Simplify right side
    64,913.80x = 4,162,811,640.54
  5. Step 5: Solve for x
    x = 4,162,811,640.54/64,913.80
  6. Step 6: Final answer
    x = 64,128.30

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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.