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Finding the Fourth Proportional to 55,590.68, 83,385.88 and 42,958.84

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Solution

The fourth proportional to 55,590.68, 83,385.88 and 42,958.84 is: 64,438.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,590.68 : 83,385.88 = 42,958.84 : x
  2. Step 2: Convert to fraction form
    55,590.68/83,385.88 = 42,958.84/x
  3. Step 3: Cross multiply
    55,590.68x = 83,385.88 × 42,958.84
  4. Step 4: Simplify right side
    55,590.68x = 3,582,160,677.18
  5. Step 5: Solve for x
    x = 3,582,160,677.18/55,590.68
  6. Step 6: Final answer
    x = 64,438.15

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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.