Home / 78,317.15-108,077.78-42,507.17

Finding the Fourth Proportional to 78,317.15, 108,077.78 and 42,507.17

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Solution

The fourth proportional to 78,317.15, 108,077.78 and 42,507.17 is: 58,659.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,317.15 : 108,077.78 = 42,507.17 : x
  2. Step 2: Convert to fraction form
    78,317.15/108,077.78 = 42,507.17/x
  3. Step 3: Cross multiply
    78,317.15x = 108,077.78 × 42,507.17
  4. Step 4: Simplify right side
    78,317.15x = 4,594,080,299.75
  5. Step 5: Solve for x
    x = 4,594,080,299.75/78,317.15
  6. Step 6: Final answer
    x = 58,659.96

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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.