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Finding the Fourth Proportional to 72,248.34, 99,702.86 and 40,417.77

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Solution

The fourth proportional to 72,248.34, 99,702.86 and 40,417.77 is: 55,776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,248.34 : 99,702.86 = 40,417.77 : x
  2. Step 2: Convert to fraction form
    72,248.34/99,702.86 = 40,417.77/x
  3. Step 3: Cross multiply
    72,248.34x = 99,702.86 × 40,417.77
  4. Step 4: Simplify right side
    72,248.34x = 4,029,767,061.73
  5. Step 5: Solve for x
    x = 4,029,767,061.73/72,248.34
  6. Step 6: Final answer
    x = 55,776.60

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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.