Home / 78,695.13-108,599.10-42,885.05

Finding the Fourth Proportional to 78,695.13, 108,599.10 and 42,885.05

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Solution

The fourth proportional to 78,695.13, 108,599.10 and 42,885.05 is: 59,181.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,695.13 : 108,599.10 = 42,885.05 : x
  2. Step 2: Convert to fraction form
    78,695.13/108,599.10 = 42,885.05/x
  3. Step 3: Cross multiply
    78,695.13x = 108,599.10 × 42,885.05
  4. Step 4: Simplify right side
    78,695.13x = 4,657,277,833.46
  5. Step 5: Solve for x
    x = 4,657,277,833.46/78,695.13
  6. Step 6: Final answer
    x = 59,181.27

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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.