Home / 105,175.87-145,142.88-57,428.20

Finding the Fourth Proportional to 105,175.87, 145,142.88 and 57,428.20

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Solution

The fourth proportional to 105,175.87, 145,142.88 and 57,428.20 is: 79,251.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,175.87 : 145,142.88 = 57,428.20 : x
  2. Step 2: Convert to fraction form
    105,175.87/145,142.88 = 57,428.20/x
  3. Step 3: Cross multiply
    105,175.87x = 145,142.88 × 57,428.20
  4. Step 4: Simplify right side
    105,175.87x = 8,335,294,341.22
  5. Step 5: Solve for x
    x = 8,335,294,341.22/105,175.87
  6. Step 6: Final answer
    x = 79,251.01

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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.