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Finding the Fourth Proportional to 121,482.90, 182,145.15 and 109,041.30

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Solution

The fourth proportional to 121,482.90, 182,145.15 and 109,041.30 is: 163,490.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,482.90 : 182,145.15 = 109,041.30 : x
  2. Step 2: Convert to fraction form
    121,482.90/182,145.15 = 109,041.30/x
  3. Step 3: Cross multiply
    121,482.90x = 182,145.15 × 109,041.30
  4. Step 4: Simplify right side
    121,482.90x = 19,861,343,944.70
  5. Step 5: Solve for x
    x = 19,861,343,944.70/121,482.90
  6. Step 6: Final answer
    x = 163,490.86

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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.