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Finding the Fourth Proportional to 91,261.60, 136,994.80 and 70,576.80

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Solution

The fourth proportional to 91,261.60, 136,994.80 and 70,576.80 is: 105,944.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,261.60 : 136,994.80 = 70,576.80 : x
  2. Step 2: Convert to fraction form
    91,261.60/136,994.80 = 70,576.80/x
  3. Step 3: Cross multiply
    91,261.60x = 136,994.80 × 70,576.80
  4. Step 4: Simplify right side
    91,261.60x = 9,668,654,600.64
  5. Step 5: Solve for x
    x = 9,668,654,600.64/91,261.60
  6. Step 6: Final answer
    x = 105,944.39

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1.5x scale

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.