Home / 91,246.60-136,972.30-70,561.80

Finding the Fourth Proportional to 91,246.60, 136,972.30 and 70,561.80

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Solution

The fourth proportional to 91,246.60, 136,972.30 and 70,561.80 is: 105,921.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,246.60 : 136,972.30 = 70,561.80 : x
  2. Step 2: Convert to fraction form
    91,246.60/136,972.30 = 70,561.80/x
  3. Step 3: Cross multiply
    91,246.60x = 136,972.30 × 70,561.80
  4. Step 4: Simplify right side
    91,246.60x = 9,665,012,038.14
  5. Step 5: Solve for x
    x = 9,665,012,038.14/91,246.60
  6. Step 6: Final answer
    x = 105,921.89

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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.