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Finding the Fourth Proportional to 91,247.60, 136,973.80 and 70,562.80

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Solution

The fourth proportional to 91,247.60, 136,973.80 and 70,562.80 is: 105,923.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,247.60 : 136,973.80 = 70,562.80 : x
  2. Step 2: Convert to fraction form
    91,247.60/136,973.80 = 70,562.80/x
  3. Step 3: Cross multiply
    91,247.60x = 136,973.80 × 70,562.80
  4. Step 4: Simplify right side
    91,247.60x = 9,665,254,854.64
  5. Step 5: Solve for x
    x = 9,665,254,854.64/91,247.60
  6. Step 6: Final answer
    x = 105,923.39

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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.