Home / 91,985.40-137,870.10-91,000.44

Finding the Fourth Proportional to 91,985.40, 137,870.10 and 91,000.44

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Solution

The fourth proportional to 91,985.40, 137,870.10 and 91,000.44 is: 136,393.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,985.40 : 137,870.10 = 91,000.44 : x
  2. Step 2: Convert to fraction form
    91,985.40/137,870.10 = 91,000.44/x
  3. Step 3: Cross multiply
    91,985.40x = 137,870.10 × 91,000.44
  4. Step 4: Simplify right side
    91,985.40x = 12,546,239,762.84
  5. Step 5: Solve for x
    x = 12,546,239,762.84/91,985.40
  6. Step 6: Final answer
    x = 136,393.82

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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.