Home / 102,587.10-153,530.55-85,965.90

Finding the Fourth Proportional to 102,587.10, 153,530.55 and 85,965.90

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Solution

The fourth proportional to 102,587.10, 153,530.55 and 85,965.90 is: 128,655.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,587.10 : 153,530.55 = 85,965.90 : x
  2. Step 2: Convert to fraction form
    102,587.10/153,530.55 = 85,965.90/x
  3. Step 3: Cross multiply
    102,587.10x = 153,530.55 × 85,965.90
  4. Step 4: Simplify right side
    102,587.10x = 13,198,391,908.25
  5. Step 5: Solve for x
    x = 13,198,391,908.25/102,587.10
  6. Step 6: Final answer
    x = 128,655.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.