Home / 53,142.30-73,341.56-39,690.20

Finding the Fourth Proportional to 53,142.30, 73,341.56 and 39,690.20

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Solution

The fourth proportional to 53,142.30, 73,341.56 and 39,690.20 is: 54,776.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,142.30 : 73,341.56 = 39,690.20 : x
  2. Step 2: Convert to fraction form
    53,142.30/73,341.56 = 39,690.20/x
  3. Step 3: Cross multiply
    53,142.30x = 73,341.56 × 39,690.20
  4. Step 4: Simplify right side
    53,142.30x = 2,910,941,169.61
  5. Step 5: Solve for x
    x = 2,910,941,169.61/53,142.30
  6. Step 6: Final answer
    x = 54,776.35

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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.