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Finding the Fourth Proportional to 74,712.60, 112,068.90 and 69,010.20

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Solution

The fourth proportional to 74,712.60, 112,068.90 and 69,010.20 is: 103,515.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,712.60 : 112,068.90 = 69,010.20 : x
  2. Step 2: Convert to fraction form
    74,712.60/112,068.90 = 69,010.20/x
  3. Step 3: Cross multiply
    74,712.60x = 112,068.90 × 69,010.20
  4. Step 4: Simplify right side
    74,712.60x = 7,733,897,202.78
  5. Step 5: Solve for x
    x = 7,733,897,202.78/74,712.60
  6. Step 6: Final answer
    x = 103,515.30

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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.