Home / 78,612.12-108,481.32-42,802.28

Finding the Fourth Proportional to 78,612.12, 108,481.32 and 42,802.28

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Solution

The fourth proportional to 78,612.12, 108,481.32 and 42,802.28 is: 59,065.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,612.12 : 108,481.32 = 42,802.28 : x
  2. Step 2: Convert to fraction form
    78,612.12/108,481.32 = 42,802.28/x
  3. Step 3: Cross multiply
    78,612.12x = 108,481.32 × 42,802.28
  4. Step 4: Simplify right side
    78,612.12x = 4,643,247,833.41
  5. Step 5: Solve for x
    x = 4,643,247,833.41/78,612.12
  6. Step 6: Final answer
    x = 59,065.29

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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.