Home / 113,415.12-156,519-63,115.20

Finding the Fourth Proportional to 113,415.12, 156,519 and 63,115.20

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Solution

The fourth proportional to 113,415.12, 156,519 and 63,115.20 is: 87,102.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,415.12 : 156,519 = 63,115.20 : x
  2. Step 2: Convert to fraction form
    113,415.12/156,519 = 63,115.20/x
  3. Step 3: Cross multiply
    113,415.12x = 156,519 × 63,115.20
  4. Step 4: Simplify right side
    113,415.12x = 9,878,727,988.80
  5. Step 5: Solve for x
    x = 9,878,727,988.80/113,415.12
  6. Step 6: Final answer
    x = 87,102.39

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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.