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Finding the Fourth Proportional to 124,423.80, 186,635.70 and 74,657.40

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Solution

The fourth proportional to 124,423.80, 186,635.70 and 74,657.40 is: 111,986.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,423.80 : 186,635.70 = 74,657.40 : x
  2. Step 2: Convert to fraction form
    124,423.80/186,635.70 = 74,657.40/x
  3. Step 3: Cross multiply
    124,423.80x = 186,635.70 × 74,657.40
  4. Step 4: Simplify right side
    124,423.80x = 13,933,736,109.18
  5. Step 5: Solve for x
    x = 13,933,736,109.18/124,423.80
  6. Step 6: Final answer
    x = 111,986.10

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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.