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Finding the Fourth Proportional to 61,411.20, 92,116.80 and 45,859.20

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Solution

The fourth proportional to 61,411.20, 92,116.80 and 45,859.20 is: 68,788.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,411.20 : 92,116.80 = 45,859.20 : x
  2. Step 2: Convert to fraction form
    61,411.20/92,116.80 = 45,859.20/x
  3. Step 3: Cross multiply
    61,411.20x = 92,116.80 × 45,859.20
  4. Step 4: Simplify right side
    61,411.20x = 4,224,402,754.56
  5. Step 5: Solve for x
    x = 4,224,402,754.56/61,411.20
  6. Step 6: Final answer
    x = 68,788.80

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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.