Home / 91,069.40-136,458.30-57,729.80

Finding the Fourth Proportional to 91,069.40, 136,458.30 and 57,729.80

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Solution

The fourth proportional to 91,069.40, 136,458.30 and 57,729.80 is: 86,502.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,069.40 : 136,458.30 = 57,729.80 : x
  2. Step 2: Convert to fraction form
    91,069.40/136,458.30 = 57,729.80/x
  3. Step 3: Cross multiply
    91,069.40x = 136,458.30 × 57,729.80
  4. Step 4: Simplify right side
    91,069.40x = 7,877,710,367.34
  5. Step 5: Solve for x
    x = 7,877,710,367.34/91,069.40
  6. Step 6: Final answer
    x = 86,502.28

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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.