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Finding the Fourth Proportional to 78,413.76, 108,218.88 and 46,589.76

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Solution

The fourth proportional to 78,413.76, 108,218.88 and 46,589.76 is: 64,298.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,413.76 : 108,218.88 = 46,589.76 : x
  2. Step 2: Convert to fraction form
    78,413.76/108,218.88 = 46,589.76/x
  3. Step 3: Cross multiply
    78,413.76x = 108,218.88 × 46,589.76
  4. Step 4: Simplify right side
    78,413.76x = 5,041,891,646.67
  5. Step 5: Solve for x
    x = 5,041,891,646.67/78,413.76
  6. Step 6: Final answer
    x = 64,298.56

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1.5x scale

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.