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Finding the Fourth Proportional to 91,177.60, 136,752.72 and 28,840

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Solution

The fourth proportional to 91,177.60, 136,752.72 and 28,840 is: 43,255.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,177.60 : 136,752.72 = 28,840 : x
  2. Step 2: Convert to fraction form
    91,177.60/136,752.72 = 28,840/x
  3. Step 3: Cross multiply
    91,177.60x = 136,752.72 × 28,840
  4. Step 4: Simplify right side
    91,177.60x = 3,943,948,444.80
  5. Step 5: Solve for x
    x = 3,943,948,444.80/91,177.60
  6. Step 6: Final answer
    x = 43,255.67

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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.