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Finding the Fourth Proportional to 103,612.01, 155,418.02 and 68,543.47

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Solution

The fourth proportional to 103,612.01, 155,418.02 and 68,543.47 is: 102,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,612.01 : 155,418.02 = 68,543.47 : x
  2. Step 2: Convert to fraction form
    103,612.01/155,418.02 = 68,543.47/x
  3. Step 3: Cross multiply
    103,612.01x = 155,418.02 × 68,543.47
  4. Step 4: Simplify right side
    103,612.01x = 10,652,889,271.52
  5. Step 5: Solve for x
    x = 10,652,889,271.52/103,612.01
  6. Step 6: Final answer
    x = 102,815.20

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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.