Home / 78,709.12-118,082.14-31,327.08

Finding the Fourth Proportional to 78,709.12, 118,082.14 and 31,327.08

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Solution

The fourth proportional to 78,709.12, 118,082.14 and 31,327.08 is: 46,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,709.12 : 118,082.14 = 31,327.08 : x
  2. Step 2: Convert to fraction form
    78,709.12/118,082.14 = 31,327.08/x
  3. Step 3: Cross multiply
    78,709.12x = 118,082.14 × 31,327.08
  4. Step 4: Simplify right side
    78,709.12x = 3,699,168,646.35
  5. Step 5: Solve for x
    x = 3,699,168,646.35/78,709.12
  6. Step 6: Final answer
    x = 46,997.97

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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.