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Finding the Fourth Proportional to 61,100.16, 91,656 and 18,980.70

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Solution

The fourth proportional to 61,100.16, 91,656 and 18,980.70 is: 28,472.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,100.16 : 91,656 = 18,980.70 : x
  2. Step 2: Convert to fraction form
    61,100.16/91,656 = 18,980.70/x
  3. Step 3: Cross multiply
    61,100.16x = 91,656 × 18,980.70
  4. Step 4: Simplify right side
    61,100.16x = 1,739,695,039.20
  5. Step 5: Solve for x
    x = 1,739,695,039.20/61,100.16
  6. Step 6: Final answer
    x = 28,472.84

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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.