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Finding the Fourth Proportional to 78,587.81, 117,882.93 and 43,748.90

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Solution

The fourth proportional to 78,587.81, 117,882.93 and 43,748.90 is: 65,624.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.81 : 117,882.93 = 43,748.90 : x
  2. Step 2: Convert to fraction form
    78,587.81/117,882.93 = 43,748.90/x
  3. Step 3: Cross multiply
    78,587.81x = 117,882.93 × 43,748.90
  4. Step 4: Simplify right side
    78,587.81x = 5,157,247,926.86
  5. Step 5: Solve for x
    x = 5,157,247,926.86/78,587.81
  6. Step 6: Final answer
    x = 65,624.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.