Home / 91,421.80-137,132.70-56,247.40

Finding the Fourth Proportional to 91,421.80, 137,132.70 and 56,247.40

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Solution

The fourth proportional to 91,421.80, 137,132.70 and 56,247.40 is: 84,371.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,421.80 : 137,132.70 = 56,247.40 : x
  2. Step 2: Convert to fraction form
    91,421.80/137,132.70 = 56,247.40/x
  3. Step 3: Cross multiply
    91,421.80x = 137,132.70 × 56,247.40
  4. Step 4: Simplify right side
    91,421.80x = 7,713,357,829.98
  5. Step 5: Solve for x
    x = 7,713,357,829.98/91,421.80
  6. Step 6: Final answer
    x = 84,371.10

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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.