Home / 78,342.21-108,112.32-42,532.20

Finding the Fourth Proportional to 78,342.21, 108,112.32 and 42,532.20

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Solution

The fourth proportional to 78,342.21, 108,112.32 and 42,532.20 is: 58,694.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.21 : 108,112.32 = 42,532.20 : x
  2. Step 2: Convert to fraction form
    78,342.21/108,112.32 = 42,532.20/x
  3. Step 3: Cross multiply
    78,342.21x = 108,112.32 × 42,532.20
  4. Step 4: Simplify right side
    78,342.21x = 4,598,254,816.70
  5. Step 5: Solve for x
    x = 4,598,254,816.70/78,342.21
  6. Step 6: Final answer
    x = 58,694.47

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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.