Home / 105,408.30-145,462.28-57,661.08

Finding the Fourth Proportional to 105,408.30, 145,462.28 and 57,661.08

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Solution

The fourth proportional to 105,408.30, 145,462.28 and 57,661.08 is: 79,571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,408.30 : 145,462.28 = 57,661.08 : x
  2. Step 2: Convert to fraction form
    105,408.30/145,462.28 = 57,661.08/x
  3. Step 3: Cross multiply
    105,408.30x = 145,462.28 × 57,661.08
  4. Step 4: Simplify right side
    105,408.30x = 8,387,511,875.76
  5. Step 5: Solve for x
    x = 8,387,511,875.76/105,408.30
  6. Step 6: Final answer
    x = 79,571.65

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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.