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Finding the Fourth Proportional to 125,557.20, 188,335.80 and 72,413.10

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Solution

The fourth proportional to 125,557.20, 188,335.80 and 72,413.10 is: 108,619.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,557.20 : 188,335.80 = 72,413.10 : x
  2. Step 2: Convert to fraction form
    125,557.20/188,335.80 = 72,413.10/x
  3. Step 3: Cross multiply
    125,557.20x = 188,335.80 × 72,413.10
  4. Step 4: Simplify right side
    125,557.20x = 13,637,979,118.98
  5. Step 5: Solve for x
    x = 13,637,979,118.98/125,557.20
  6. Step 6: Final answer
    x = 108,619.65

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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.