Home / 85,445.06-117,878.02-57,159.86

Finding the Fourth Proportional to 85,445.06, 117,878.02 and 57,159.86

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Solution

The fourth proportional to 85,445.06, 117,878.02 and 57,159.86 is: 78,856.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,445.06 : 117,878.02 = 57,159.86 : x
  2. Step 2: Convert to fraction form
    85,445.06/117,878.02 = 57,159.86/x
  3. Step 3: Cross multiply
    85,445.06x = 117,878.02 × 57,159.86
  4. Step 4: Simplify right side
    85,445.06x = 6,737,890,387.99
  5. Step 5: Solve for x
    x = 6,737,890,387.99/85,445.06
  6. Step 6: Final answer
    x = 78,856.41

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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.