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Finding the Fourth Proportional to 70,488.64, 97,273.87 and 40,283.20

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Solution

The fourth proportional to 70,488.64, 97,273.87 and 40,283.20 is: 55,590.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,488.64 : 97,273.87 = 40,283.20 : x
  2. Step 2: Convert to fraction form
    70,488.64/97,273.87 = 40,283.20/x
  3. Step 3: Cross multiply
    70,488.64x = 97,273.87 × 40,283.20
  4. Step 4: Simplify right side
    70,488.64x = 3,918,502,759.98
  5. Step 5: Solve for x
    x = 3,918,502,759.98/70,488.64
  6. Step 6: Final answer
    x = 55,590.56

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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.