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Finding the Fourth Proportional to 98,490.60, 147,808.80 and 39,368.70

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Solution

The fourth proportional to 98,490.60, 147,808.80 and 39,368.70 is: 59,082.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,490.60 : 147,808.80 = 39,368.70 : x
  2. Step 2: Convert to fraction form
    98,490.60/147,808.80 = 39,368.70/x
  3. Step 3: Cross multiply
    98,490.60x = 147,808.80 × 39,368.70
  4. Step 4: Simplify right side
    98,490.60x = 5,819,040,304.56
  5. Step 5: Solve for x
    x = 5,819,040,304.56/98,490.60
  6. Step 6: Final answer
    x = 59,082.19

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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.