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Finding the Fourth Proportional to 78,494.60, 117,741.90 and 47,001.80

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Solution

The fourth proportional to 78,494.60, 117,741.90 and 47,001.80 is: 70,502.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,494.60 : 117,741.90 = 47,001.80 : x
  2. Step 2: Convert to fraction form
    78,494.60/117,741.90 = 47,001.80/x
  3. Step 3: Cross multiply
    78,494.60x = 117,741.90 × 47,001.80
  4. Step 4: Simplify right side
    78,494.60x = 5,534,081,235.42
  5. Step 5: Solve for x
    x = 5,534,081,235.42/78,494.60
  6. Step 6: Final answer
    x = 70,502.70

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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.