Home / 100,413.42-138,565.53-57,391.62

Finding the Fourth Proportional to 100,413.42, 138,565.53 and 57,391.62

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Solution

The fourth proportional to 100,413.42, 138,565.53 and 57,391.62 is: 79,197.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,413.42 : 138,565.53 = 57,391.62 : x
  2. Step 2: Convert to fraction form
    100,413.42/138,565.53 = 57,391.62/x
  3. Step 3: Cross multiply
    100,413.42x = 138,565.53 × 57,391.62
  4. Step 4: Simplify right side
    100,413.42x = 7,952,500,242.86
  5. Step 5: Solve for x
    x = 7,952,500,242.86/100,413.42
  6. Step 6: Final answer
    x = 79,197.58

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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.