Home / 103,638.30-155,380.65-70,275.10

Finding the Fourth Proportional to 103,638.30, 155,380.65 and 70,275.10

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Solution

The fourth proportional to 103,638.30, 155,380.65 and 70,275.10 is: 105,360.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,638.30 : 155,380.65 = 70,275.10 : x
  2. Step 2: Convert to fraction form
    103,638.30/155,380.65 = 70,275.10/x
  3. Step 3: Cross multiply
    103,638.30x = 155,380.65 × 70,275.10
  4. Step 4: Simplify right side
    103,638.30x = 10,919,390,716.82
  5. Step 5: Solve for x
    x = 10,919,390,716.82/103,638.30
  6. Step 6: Final answer
    x = 105,360.57

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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.