Home / 103,538.20-155,307.30-66,213.40

Finding the Fourth Proportional to 103,538.20, 155,307.30 and 66,213.40

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Solution

The fourth proportional to 103,538.20, 155,307.30 and 66,213.40 is: 99,320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,538.20 : 155,307.30 = 66,213.40 : x
  2. Step 2: Convert to fraction form
    103,538.20/155,307.30 = 66,213.40/x
  3. Step 3: Cross multiply
    103,538.20x = 155,307.30 × 66,213.40
  4. Step 4: Simplify right side
    103,538.20x = 10,283,424,377.82
  5. Step 5: Solve for x
    x = 10,283,424,377.82/103,538.20
  6. Step 6: Final answer
    x = 99,320.10

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1.5x scale

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.