Home / 78,543.42-117,281.55-76,415.15

Finding the Fourth Proportional to 78,543.42, 117,281.55 and 76,415.15

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Solution

The fourth proportional to 78,543.42, 117,281.55 and 76,415.15 is: 114,103.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,543.42 : 117,281.55 = 76,415.15 : x
  2. Step 2: Convert to fraction form
    78,543.42/117,281.55 = 76,415.15/x
  3. Step 3: Cross multiply
    78,543.42x = 117,281.55 × 76,415.15
  4. Step 4: Simplify right side
    78,543.42x = 8,962,086,649.07
  5. Step 5: Solve for x
    x = 8,962,086,649.07/78,543.42
  6. Step 6: Final answer
    x = 114,103.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.