Home / 100,385.04-138,520.08-57,957.60

Finding the Fourth Proportional to 100,385.04, 138,520.08 and 57,957.60

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Solution

The fourth proportional to 100,385.04, 138,520.08 and 57,957.60 is: 79,974.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,385.04 : 138,520.08 = 57,957.60 : x
  2. Step 2: Convert to fraction form
    100,385.04/138,520.08 = 57,957.60/x
  3. Step 3: Cross multiply
    100,385.04x = 138,520.08 × 57,957.60
  4. Step 4: Simplify right side
    100,385.04x = 8,028,291,388.61
  5. Step 5: Solve for x
    x = 8,028,291,388.61/100,385.04
  6. Step 6: Final answer
    x = 79,974.98

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1.5x scale

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.