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Finding the Fourth Proportional to 91,478.68, 136,996.55 and 63,319.84

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Solution

The fourth proportional to 91,478.68, 136,996.55 and 63,319.84 is: 94,826.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,478.68 : 136,996.55 = 63,319.84 : x
  2. Step 2: Convert to fraction form
    91,478.68/136,996.55 = 63,319.84/x
  3. Step 3: Cross multiply
    91,478.68x = 136,996.55 × 63,319.84
  4. Step 4: Simplify right side
    91,478.68x = 8,674,598,941.57
  5. Step 5: Solve for x
    x = 8,674,598,941.57/91,478.68
  6. Step 6: Final answer
    x = 94,826.46

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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.