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Finding the Fourth Proportional to 74,707.60, 112,061.40 and 74,189.20

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Solution

The fourth proportional to 74,707.60, 112,061.40 and 74,189.20 is: 111,283.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,707.60 : 112,061.40 = 74,189.20 : x
  2. Step 2: Convert to fraction form
    74,707.60/112,061.40 = 74,189.20/x
  3. Step 3: Cross multiply
    74,707.60x = 112,061.40 × 74,189.20
  4. Step 4: Simplify right side
    74,707.60x = 8,313,745,616.88
  5. Step 5: Solve for x
    x = 8,313,745,616.88/74,707.60
  6. Step 6: Final answer
    x = 111,283.80

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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.