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Finding the Fourth Proportional to 103,410.40, 142,719.80 and 63,115.80

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Solution

The fourth proportional to 103,410.40, 142,719.80 and 63,115.80 is: 87,108.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,410.40 : 142,719.80 = 63,115.80 : x
  2. Step 2: Convert to fraction form
    103,410.40/142,719.80 = 63,115.80/x
  3. Step 3: Cross multiply
    103,410.40x = 142,719.80 × 63,115.80
  4. Step 4: Simplify right side
    103,410.40x = 9,007,874,352.84
  5. Step 5: Solve for x
    x = 9,007,874,352.84/103,410.40
  6. Step 6: Final answer
    x = 87,108.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.