Home / 78,319.74-108,081.37-42,509.77

Finding the Fourth Proportional to 78,319.74, 108,081.37 and 42,509.77

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Solution

The fourth proportional to 78,319.74, 108,081.37 and 42,509.77 is: 58,663.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,319.74 : 108,081.37 = 42,509.77 : x
  2. Step 2: Convert to fraction form
    78,319.74/108,081.37 = 42,509.77/x
  3. Step 3: Cross multiply
    78,319.74x = 108,081.37 × 42,509.77
  4. Step 4: Simplify right side
    78,319.74x = 4,594,513,697.23
  5. Step 5: Solve for x
    x = 4,594,513,697.23/78,319.74
  6. Step 6: Final answer
    x = 58,663.55

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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.