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Finding the Fourth Proportional to 85,157.65, 127,657.05 and 28,959.35

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Solution

The fourth proportional to 85,157.65, 127,657.05 and 28,959.35 is: 43,412.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,157.65 : 127,657.05 = 28,959.35 : x
  2. Step 2: Convert to fraction form
    85,157.65/127,657.05 = 28,959.35/x
  3. Step 3: Cross multiply
    85,157.65x = 127,657.05 × 28,959.35
  4. Step 4: Simplify right side
    85,157.65x = 3,696,865,401.46
  5. Step 5: Solve for x
    x = 3,696,865,401.46/85,157.65
  6. Step 6: Final answer
    x = 43,412.02

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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.