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Finding the Fourth Proportional to 98,401.60, 135,799.92 and 74,490.40

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Solution

The fourth proportional to 98,401.60, 135,799.92 and 74,490.40 is: 102,801.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,401.60 : 135,799.92 = 74,490.40 : x
  2. Step 2: Convert to fraction form
    98,401.60/135,799.92 = 74,490.40/x
  3. Step 3: Cross multiply
    98,401.60x = 135,799.92 × 74,490.40
  4. Step 4: Simplify right side
    98,401.60x = 10,115,790,360.77
  5. Step 5: Solve for x
    x = 10,115,790,360.77/98,401.60
  6. Step 6: Final answer
    x = 102,801.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.