Home / 78,319.12-108,080.48-42,509.13

Finding the Fourth Proportional to 78,319.12, 108,080.48 and 42,509.13

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Solution

The fourth proportional to 78,319.12, 108,080.48 and 42,509.13 is: 58,662.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.12 : 108,080.48 = 42,509.13 : x
  2. Step 2: Convert to fraction form
    78,319.12/108,080.48 = 42,509.13/x
  3. Step 3: Cross multiply
    78,319.12x = 108,080.48 × 42,509.13
  4. Step 4: Simplify right side
    78,319.12x = 4,594,407,174.78
  5. Step 5: Solve for x
    x = 4,594,407,174.78/78,319.12
  6. Step 6: Final answer
    x = 58,662.65

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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.