Home / 78,575.17-108,436.40-42,766.48

Finding the Fourth Proportional to 78,575.17, 108,436.40 and 42,766.48

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Solution

The fourth proportional to 78,575.17, 108,436.40 and 42,766.48 is: 59,019.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,575.17 : 108,436.40 = 42,766.48 : x
  2. Step 2: Convert to fraction form
    78,575.17/108,436.40 = 42,766.48/x
  3. Step 3: Cross multiply
    78,575.17x = 108,436.40 × 42,766.48
  4. Step 4: Simplify right side
    78,575.17x = 4,637,442,918.04
  5. Step 5: Solve for x
    x = 4,637,442,918.04/78,575.17
  6. Step 6: Final answer
    x = 59,019.19

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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.