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Finding the Fourth Proportional to 45,978.48, 63,456.17 and 28,069.65

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Solution

The fourth proportional to 45,978.48, 63,456.17 and 28,069.65 is: 38,739.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,978.48 : 63,456.17 = 28,069.65 : x
  2. Step 2: Convert to fraction form
    45,978.48/63,456.17 = 28,069.65/x
  3. Step 3: Cross multiply
    45,978.48x = 63,456.17 × 28,069.65
  4. Step 4: Simplify right side
    45,978.48x = 1,781,192,341.89
  5. Step 5: Solve for x
    x = 1,781,192,341.89/45,978.48
  6. Step 6: Final answer
    x = 38,739.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.