Home / 78,921.15-108,909.39-43,111.32

Finding the Fourth Proportional to 78,921.15, 108,909.39 and 43,111.32

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Solution

The fourth proportional to 78,921.15, 108,909.39 and 43,111.32 is: 59,492.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921.15 : 108,909.39 = 43,111.32 : x
  2. Step 2: Convert to fraction form
    78,921.15/108,909.39 = 43,111.32/x
  3. Step 3: Cross multiply
    78,921.15x = 108,909.39 × 43,111.32
  4. Step 4: Simplify right side
    78,921.15x = 4,695,227,563.29
  5. Step 5: Solve for x
    x = 4,695,227,563.29/78,921.15
  6. Step 6: Final answer
    x = 59,492.64

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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.