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Finding the Fourth Proportional to 74,359.70, 111,539.55 and 66,842.90

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Solution

The fourth proportional to 74,359.70, 111,539.55 and 66,842.90 is: 100,264.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,359.70 : 111,539.55 = 66,842.90 : x
  2. Step 2: Convert to fraction form
    74,359.70/111,539.55 = 66,842.90/x
  3. Step 3: Cross multiply
    74,359.70x = 111,539.55 × 66,842.90
  4. Step 4: Simplify right side
    74,359.70x = 7,455,626,986.70
  5. Step 5: Solve for x
    x = 7,455,626,986.70/74,359.70
  6. Step 6: Final answer
    x = 100,264.35

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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.