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Finding the Fourth Proportional to 99,053.40, 148,908.15 and 84,619.20

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Solution

The fourth proportional to 99,053.40, 148,908.15 and 84,619.20 is: 127,209.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,053.40 : 148,908.15 = 84,619.20 : x
  2. Step 2: Convert to fraction form
    99,053.40/148,908.15 = 84,619.20/x
  3. Step 3: Cross multiply
    99,053.40x = 148,908.15 × 84,619.20
  4. Step 4: Simplify right side
    99,053.40x = 12,600,488,526.48
  5. Step 5: Solve for x
    x = 12,600,488,526.48/99,053.40
  6. Step 6: Final answer
    x = 127,209.05

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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.