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Finding the Fourth Proportional to 99,298.80, 148,948.20 and 63,869.40

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Solution

The fourth proportional to 99,298.80, 148,948.20 and 63,869.40 is: 95,804.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,298.80 : 148,948.20 = 63,869.40 : x
  2. Step 2: Convert to fraction form
    99,298.80/148,948.20 = 63,869.40/x
  3. Step 3: Cross multiply
    99,298.80x = 148,948.20 × 63,869.40
  4. Step 4: Simplify right side
    99,298.80x = 9,513,232,165.08
  5. Step 5: Solve for x
    x = 9,513,232,165.08/99,298.80
  6. Step 6: Final answer
    x = 95,804.10

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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.