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Finding the Fourth Proportional to 68,646.60, 103,034.70 and 42,402.60

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Solution

The fourth proportional to 68,646.60, 103,034.70 and 42,402.60 is: 63,643.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,646.60 : 103,034.70 = 42,402.60 : x
  2. Step 2: Convert to fraction form
    68,646.60/103,034.70 = 42,402.60/x
  3. Step 3: Cross multiply
    68,646.60x = 103,034.70 × 42,402.60
  4. Step 4: Simplify right side
    68,646.60x = 4,368,939,170.22
  5. Step 5: Solve for x
    x = 4,368,939,170.22/68,646.60
  6. Step 6: Final answer
    x = 63,643.93

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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.