Home / 91,420.20-137,133.27-31,448.07

Finding the Fourth Proportional to 91,420.20, 137,133.27 and 31,448.07

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Solution

The fourth proportional to 91,420.20, 137,133.27 and 31,448.07 is: 47,173.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,420.20 : 137,133.27 = 31,448.07 : x
  2. Step 2: Convert to fraction form
    91,420.20/137,133.27 = 31,448.07/x
  3. Step 3: Cross multiply
    91,420.20x = 137,133.27 × 31,448.07
  4. Step 4: Simplify right side
    91,420.20x = 4,312,576,674.29
  5. Step 5: Solve for x
    x = 4,312,576,674.29/91,420.20
  6. Step 6: Final answer
    x = 47,173.13

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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.