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Finding the Fourth Proportional to 48,294.72, 72,400.64 and 21,990.08

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Solution

The fourth proportional to 48,294.72, 72,400.64 and 21,990.08 is: 32,966.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,294.72 : 72,400.64 = 21,990.08 : x
  2. Step 2: Convert to fraction form
    48,294.72/72,400.64 = 21,990.08/x
  3. Step 3: Cross multiply
    48,294.72x = 72,400.64 × 21,990.08
  4. Step 4: Simplify right side
    48,294.72x = 1,592,095,865.65
  5. Step 5: Solve for x
    x = 1,592,095,865.65/48,294.72
  6. Step 6: Final answer
    x = 32,966.25

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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.