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Finding the Fourth Proportional to 77,980.93, 107,613.36 and 42,170.93

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Solution

The fourth proportional to 77,980.93, 107,613.36 and 42,170.93 is: 58,195.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980.93 : 107,613.36 = 42,170.93 : x
  2. Step 2: Convert to fraction form
    77,980.93/107,613.36 = 42,170.93/x
  3. Step 3: Cross multiply
    77,980.93x = 107,613.36 × 42,170.93
  4. Step 4: Simplify right side
    77,980.93x = 4,538,155,337.11
  5. Step 5: Solve for x
    x = 4,538,155,337.11/77,980.93
  6. Step 6: Final answer
    x = 58,195.71

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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.