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Finding the Fourth Proportional to 71,611.65, 98,831.88 and 40,987.55

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Solution

The fourth proportional to 71,611.65, 98,831.88 and 40,987.55 is: 56,567.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,611.65 : 98,831.88 = 40,987.55 : x
  2. Step 2: Convert to fraction form
    71,611.65/98,831.88 = 40,987.55/x
  3. Step 3: Cross multiply
    71,611.65x = 98,831.88 × 40,987.55
  4. Step 4: Simplify right side
    71,611.65x = 4,050,876,870.17
  5. Step 5: Solve for x
    x = 4,050,876,870.17/71,611.65
  6. Step 6: Final answer
    x = 56,567.29

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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.