Home / 78,468.36-108,288.20-42,660.32

Finding the Fourth Proportional to 78,468.36, 108,288.20 and 42,660.32

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Solution

The fourth proportional to 78,468.36, 108,288.20 and 42,660.32 is: 58,872.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,468.36 : 108,288.20 = 42,660.32 : x
  2. Step 2: Convert to fraction form
    78,468.36/108,288.20 = 42,660.32/x
  3. Step 3: Cross multiply
    78,468.36x = 108,288.20 × 42,660.32
  4. Step 4: Simplify right side
    78,468.36x = 4,619,609,264.22
  5. Step 5: Solve for x
    x = 4,619,609,264.22/78,468.36
  6. Step 6: Final answer
    x = 58,872.25

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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.