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Finding the Fourth Proportional to 112,412.40, 168,553.80 and 42,298.80

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Solution

The fourth proportional to 112,412.40, 168,553.80 and 42,298.80 is: 63,423.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,412.40 : 168,553.80 = 42,298.80 : x
  2. Step 2: Convert to fraction form
    112,412.40/168,553.80 = 42,298.80/x
  3. Step 3: Cross multiply
    112,412.40x = 168,553.80 × 42,298.80
  4. Step 4: Simplify right side
    112,412.40x = 7,129,623,475.44
  5. Step 5: Solve for x
    x = 7,129,623,475.44/112,412.40
  6. Step 6: Final answer
    x = 63,423.82

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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.