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Finding the Fourth Proportional to 124,642.80, 186,964.20 and 74,779.20

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Solution

The fourth proportional to 124,642.80, 186,964.20 and 74,779.20 is: 112,168.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,642.80 : 186,964.20 = 74,779.20 : x
  2. Step 2: Convert to fraction form
    124,642.80/186,964.20 = 74,779.20/x
  3. Step 3: Cross multiply
    124,642.80x = 186,964.20 × 74,779.20
  4. Step 4: Simplify right side
    124,642.80x = 13,981,033,304.64
  5. Step 5: Solve for x
    x = 13,981,033,304.64/124,642.80
  6. Step 6: Final answer
    x = 112,168.80

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1.5x scale

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.