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Finding the Fourth Proportional to 70,385.87, 105,577.97 and 28,265.20

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Solution

The fourth proportional to 70,385.87, 105,577.97 and 28,265.20 is: 42,397.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,385.87 : 105,577.97 = 28,265.20 : x
  2. Step 2: Convert to fraction form
    70,385.87/105,577.97 = 28,265.20/x
  3. Step 3: Cross multiply
    70,385.87x = 105,577.97 × 28,265.20
  4. Step 4: Simplify right side
    70,385.87x = 2,984,182,032.37
  5. Step 5: Solve for x
    x = 2,984,182,032.37/70,385.87
  6. Step 6: Final answer
    x = 42,397.46

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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.