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Finding the Fourth Proportional to 68,475.60, 102,713.40 and 42,094.80

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Solution

The fourth proportional to 68,475.60, 102,713.40 and 42,094.80 is: 63,142.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,475.60 : 102,713.40 = 42,094.80 : x
  2. Step 2: Convert to fraction form
    68,475.60/102,713.40 = 42,094.80/x
  3. Step 3: Cross multiply
    68,475.60x = 102,713.40 × 42,094.80
  4. Step 4: Simplify right side
    68,475.60x = 4,323,700,030.32
  5. Step 5: Solve for x
    x = 4,323,700,030.32/68,475.60
  6. Step 6: Final answer
    x = 63,142.20

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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.