Home / 103,876.81-155,885.33-40,689.10

Finding the Fourth Proportional to 103,876.81, 155,885.33 and 40,689.10

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Solution

The fourth proportional to 103,876.81, 155,885.33 and 40,689.10 is: 61,061.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,876.81 : 155,885.33 = 40,689.10 : x
  2. Step 2: Convert to fraction form
    103,876.81/155,885.33 = 40,689.10/x
  3. Step 3: Cross multiply
    103,876.81x = 155,885.33 × 40,689.10
  4. Step 4: Simplify right side
    103,876.81x = 6,342,833,011.37
  5. Step 5: Solve for x
    x = 6,342,833,011.37/103,876.81
  6. Step 6: Final answer
    x = 61,061.11

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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.