Home / 213,420.24-320,165.13-99,681.81

Finding the Fourth Proportional to 213,420.24, 320,165.13 and 99,681.81

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Solution

The fourth proportional to 213,420.24, 320,165.13 and 99,681.81 is: 149,538.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,420.24 : 320,165.13 = 99,681.81 : x
  2. Step 2: Convert to fraction form
    213,420.24/320,165.13 = 99,681.81/x
  3. Step 3: Cross multiply
    213,420.24x = 320,165.13 × 99,681.81
  4. Step 4: Simplify right side
    213,420.24x = 31,914,639,657.29
  5. Step 5: Solve for x
    x = 31,914,639,657.29/213,420.24
  6. Step 6: Final answer
    x = 149,538.95

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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.