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Finding the Fourth Proportional to 145,643.69, 218,550.45 and 61,398.70

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Solution

The fourth proportional to 145,643.69, 218,550.45 and 61,398.70 is: 92,133.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,643.69 : 218,550.45 = 61,398.70 : x
  2. Step 2: Convert to fraction form
    145,643.69/218,550.45 = 61,398.70/x
  3. Step 3: Cross multiply
    145,643.69x = 218,550.45 × 61,398.70
  4. Step 4: Simplify right side
    145,643.69x = 13,418,713,514.42
  5. Step 5: Solve for x
    x = 13,418,713,514.42/145,643.69
  6. Step 6: Final answer
    x = 92,133.85

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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.