Home / 129,413.46-178,583.76-72,828.48

Finding the Fourth Proportional to 129,413.46, 178,583.76 and 72,828.48

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Solution

The fourth proportional to 129,413.46, 178,583.76 and 72,828.48 is: 100,499.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,413.46 : 178,583.76 = 72,828.48 : x
  2. Step 2: Convert to fraction form
    129,413.46/178,583.76 = 72,828.48/x
  3. Step 3: Cross multiply
    129,413.46x = 178,583.76 × 72,828.48
  4. Step 4: Simplify right side
    129,413.46x = 13,005,983,793.48
  5. Step 5: Solve for x
    x = 13,005,983,793.48/129,413.46
  6. Step 6: Final answer
    x = 100,499.47

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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.