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Finding the Fourth Proportional to 108,605.62, 149,879.80 and 60,857.20

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Solution

The fourth proportional to 108,605.62, 149,879.80 and 60,857.20 is: 83,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,605.62 : 149,879.80 = 60,857.20 : x
  2. Step 2: Convert to fraction form
    108,605.62/149,879.80 = 60,857.20/x
  3. Step 3: Cross multiply
    108,605.62x = 149,879.80 × 60,857.20
  4. Step 4: Simplify right side
    108,605.62x = 9,121,264,964.56
  5. Step 5: Solve for x
    x = 9,121,264,964.56/108,605.62
  6. Step 6: Final answer
    x = 83,985.20

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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.