Home / 102,972.28-142,068.72-57,643.60

Finding the Fourth Proportional to 102,972.28, 142,068.72 and 57,643.60

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Solution

The fourth proportional to 102,972.28, 142,068.72 and 57,643.60 is: 79,529.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,972.28 : 142,068.72 = 57,643.60 : x
  2. Step 2: Convert to fraction form
    102,972.28/142,068.72 = 57,643.60/x
  3. Step 3: Cross multiply
    102,972.28x = 142,068.72 × 57,643.60
  4. Step 4: Simplify right side
    102,972.28x = 8,189,352,468.19
  5. Step 5: Solve for x
    x = 8,189,352,468.19/102,972.28
  6. Step 6: Final answer
    x = 79,529.68

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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.