Home / 128,002.18-176,643.12-71,413.57

Finding the Fourth Proportional to 128,002.18, 176,643.12 and 71,413.57

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Solution

The fourth proportional to 128,002.18, 176,643.12 and 71,413.57 is: 98,550.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,002.18 : 176,643.12 = 71,413.57 : x
  2. Step 2: Convert to fraction form
    128,002.18/176,643.12 = 71,413.57/x
  3. Step 3: Cross multiply
    128,002.18x = 176,643.12 × 71,413.57
  4. Step 4: Simplify right side
    128,002.18x = 12,614,715,815.14
  5. Step 5: Solve for x
    x = 12,614,715,815.14/128,002.18
  6. Step 6: Final answer
    x = 98,550.79

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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.