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Finding the Fourth Proportional to 84,000.30, 126,000.45 and 42,009.90

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Solution

The fourth proportional to 84,000.30, 126,000.45 and 42,009.90 is: 63,014.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,000.30 : 126,000.45 = 42,009.90 : x
  2. Step 2: Convert to fraction form
    84,000.30/126,000.45 = 42,009.90/x
  3. Step 3: Cross multiply
    84,000.30x = 126,000.45 × 42,009.90
  4. Step 4: Simplify right side
    84,000.30x = 5,293,266,304.46
  5. Step 5: Solve for x
    x = 5,293,266,304.46/84,000.30
  6. Step 6: Final answer
    x = 63,014.85

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1.5x scale

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.