Home / 111,989.48-154,545.90-61,688.36

Finding the Fourth Proportional to 111,989.48, 154,545.90 and 61,688.36

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Solution

The fourth proportional to 111,989.48, 154,545.90 and 61,688.36 is: 85,130.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,989.48 : 154,545.90 = 61,688.36 : x
  2. Step 2: Convert to fraction form
    111,989.48/154,545.90 = 61,688.36/x
  3. Step 3: Cross multiply
    111,989.48x = 154,545.90 × 61,688.36
  4. Step 4: Simplify right side
    111,989.48x = 9,533,683,115.72
  5. Step 5: Solve for x
    x = 9,533,683,115.72/111,989.48
  6. Step 6: Final answer
    x = 85,130.17

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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.