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Finding the Fourth Proportional to 80,955.75, 111,718.95 and 47,421.75

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Solution

The fourth proportional to 80,955.75, 111,718.95 and 47,421.75 is: 65,442.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,955.75 : 111,718.95 = 47,421.75 : x
  2. Step 2: Convert to fraction form
    80,955.75/111,718.95 = 47,421.75/x
  3. Step 3: Cross multiply
    80,955.75x = 111,718.95 × 47,421.75
  4. Step 4: Simplify right side
    80,955.75x = 5,297,908,117.16
  5. Step 5: Solve for x
    x = 5,297,908,117.16/80,955.75
  6. Step 6: Final answer
    x = 65,442.02

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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.