Home / 85,711.95-118,281.20-47,987.55

Finding the Fourth Proportional to 85,711.95, 118,281.20 and 47,987.55

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Solution

The fourth proportional to 85,711.95, 118,281.20 and 47,987.55 is: 66,222.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,711.95 : 118,281.20 = 47,987.55 : x
  2. Step 2: Convert to fraction form
    85,711.95/118,281.20 = 47,987.55/x
  3. Step 3: Cross multiply
    85,711.95x = 118,281.20 × 47,987.55
  4. Step 4: Simplify right side
    85,711.95x = 5,676,024,759.12
  5. Step 5: Solve for x
    x = 5,676,024,759.12/85,711.95
  6. Step 6: Final answer
    x = 66,222.09

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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.