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Finding the Fourth Proportional to 61,854.85, 92,828.92 and 45,257.70

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Solution

The fourth proportional to 61,854.85, 92,828.92 and 45,257.70 is: 67,920.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,854.85 : 92,828.92 = 45,257.70 : x
  2. Step 2: Convert to fraction form
    61,854.85/92,828.92 = 45,257.70/x
  3. Step 3: Cross multiply
    61,854.85x = 92,828.92 × 45,257.70
  4. Step 4: Simplify right side
    61,854.85x = 4,201,223,678.67
  5. Step 5: Solve for x
    x = 4,201,223,678.67/61,854.85
  6. Step 6: Final answer
    x = 67,920.68

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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.