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Finding the Fourth Proportional to 74,585.60, 111,939.60 and 74,002.40

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Solution

The fourth proportional to 74,585.60, 111,939.60 and 74,002.40 is: 111,064.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,585.60 : 111,939.60 = 74,002.40 : x
  2. Step 2: Convert to fraction form
    74,585.60/111,939.60 = 74,002.40/x
  3. Step 3: Cross multiply
    74,585.60x = 111,939.60 × 74,002.40
  4. Step 4: Simplify right side
    74,585.60x = 8,283,799,055.04
  5. Step 5: Solve for x
    x = 8,283,799,055.04/74,585.60
  6. Step 6: Final answer
    x = 111,064.32

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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.