Home / 78,319.66-108,081.23-42,509.68

Finding the Fourth Proportional to 78,319.66, 108,081.23 and 42,509.68

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Solution

The fourth proportional to 78,319.66, 108,081.23 and 42,509.68 is: 58,663.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.66 : 108,081.23 = 42,509.68 : x
  2. Step 2: Convert to fraction form
    78,319.66/108,081.23 = 42,509.68/x
  3. Step 3: Cross multiply
    78,319.66x = 108,081.23 × 42,509.68
  4. Step 4: Simplify right side
    78,319.66x = 4,594,498,288.76
  5. Step 5: Solve for x
    x = 4,594,498,288.76/78,319.66
  6. Step 6: Final answer
    x = 58,663.41

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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.