Home / 78,577.27-108,438.95-42,769.60

Finding the Fourth Proportional to 78,577.27, 108,438.95 and 42,769.60

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Solution

The fourth proportional to 78,577.27, 108,438.95 and 42,769.60 is: 59,023.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,577.27 : 108,438.95 = 42,769.60 : x
  2. Step 2: Convert to fraction form
    78,577.27/108,438.95 = 42,769.60/x
  3. Step 3: Cross multiply
    78,577.27x = 108,438.95 × 42,769.60
  4. Step 4: Simplify right side
    78,577.27x = 4,637,890,515.92
  5. Step 5: Solve for x
    x = 4,637,890,515.92/78,577.27
  6. Step 6: Final answer
    x = 59,023.31

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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.