Home / 111,989.30-154,545.24-61,688.30

Finding the Fourth Proportional to 111,989.30, 154,545.24 and 61,688.30

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Solution

The fourth proportional to 111,989.30, 154,545.24 and 61,688.30 is: 85,129.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.30 : 154,545.24 = 61,688.30 : x
  2. Step 2: Convert to fraction form
    111,989.30/154,545.24 = 61,688.30/x
  3. Step 3: Cross multiply
    111,989.30x = 154,545.24 × 61,688.30
  4. Step 4: Simplify right side
    111,989.30x = 9,533,633,128.69
  5. Step 5: Solve for x
    x = 9,533,633,128.69/111,989.30
  6. Step 6: Final answer
    x = 85,129.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.