Home / 103,640.10-155,690.55-100,875.30

Finding the Fourth Proportional to 103,640.10, 155,690.55 and 100,875.30

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Solution

The fourth proportional to 103,640.10, 155,690.55 and 100,875.30 is: 151,537.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,640.10 : 155,690.55 = 100,875.30 : x
  2. Step 2: Convert to fraction form
    103,640.10/155,690.55 = 100,875.30/x
  3. Step 3: Cross multiply
    103,640.10x = 155,690.55 × 100,875.30
  4. Step 4: Simplify right side
    103,640.10x = 15,705,330,938.42
  5. Step 5: Solve for x
    x = 15,705,330,938.42/103,640.10
  6. Step 6: Final answer
    x = 151,537.20

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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.