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Finding the Fourth Proportional to 156,397.92, 215,826.48 and 88,413.84

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Solution

The fourth proportional to 156,397.92, 215,826.48 and 88,413.84 is: 122,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,397.92 : 215,826.48 = 88,413.84 : x
  2. Step 2: Convert to fraction form
    156,397.92/215,826.48 = 88,413.84/x
  3. Step 3: Cross multiply
    156,397.92x = 215,826.48 × 88,413.84
  4. Step 4: Simplify right side
    156,397.92x = 19,082,047,870.48
  5. Step 5: Solve for x
    x = 19,082,047,870.48/156,397.92
  6. Step 6: Final answer
    x = 122,009.60

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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.