Home / 105,390.28-145,442.82-57,645.64

Finding the Fourth Proportional to 105,390.28, 145,442.82 and 57,645.64

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Solution

The fourth proportional to 105,390.28, 145,442.82 and 57,645.64 is: 79,553.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,390.28 : 145,442.82 = 57,645.64 : x
  2. Step 2: Convert to fraction form
    105,390.28/145,442.82 = 57,645.64/x
  3. Step 3: Cross multiply
    105,390.28x = 145,442.82 × 57,645.64
  4. Step 4: Simplify right side
    105,390.28x = 8,384,144,442.30
  5. Step 5: Solve for x
    x = 8,384,144,442.30/105,390.28
  6. Step 6: Final answer
    x = 79,553.30

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1.5x scale

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.