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Finding the Fourth Proportional to 61,398.94, 84,685.18 and 42,284.79

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Solution

The fourth proportional to 61,398.94, 84,685.18 and 42,284.79 is: 58,321.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,398.94 : 84,685.18 = 42,284.79 : x
  2. Step 2: Convert to fraction form
    61,398.94/84,685.18 = 42,284.79/x
  3. Step 3: Cross multiply
    61,398.94x = 84,685.18 × 42,284.79
  4. Step 4: Simplify right side
    61,398.94x = 3,580,895,052.41
  5. Step 5: Solve for x
    x = 3,580,895,052.41/61,398.94
  6. Step 6: Final answer
    x = 58,321.77

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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.