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Finding the Fourth Proportional to 90,751.61, 136,127.55 and 35,347.61

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Solution

The fourth proportional to 90,751.61, 136,127.55 and 35,347.61 is: 53,021.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,751.61 : 136,127.55 = 35,347.61 : x
  2. Step 2: Convert to fraction form
    90,751.61/136,127.55 = 35,347.61/x
  3. Step 3: Cross multiply
    90,751.61x = 136,127.55 × 35,347.61
  4. Step 4: Simplify right side
    90,751.61x = 4,811,782,867.02
  5. Step 5: Solve for x
    x = 4,811,782,867.02/90,751.61
  6. Step 6: Final answer
    x = 53,021.46

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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.