Home / 105,132.38-145,085.43-57,390.14

Finding the Fourth Proportional to 105,132.38, 145,085.43 and 57,390.14

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Solution

The fourth proportional to 105,132.38, 145,085.43 and 57,390.14 is: 79,199.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,132.38 : 145,085.43 = 57,390.14 : x
  2. Step 2: Convert to fraction form
    105,132.38/145,085.43 = 57,390.14/x
  3. Step 3: Cross multiply
    105,132.38x = 145,085.43 × 57,390.14
  4. Step 4: Simplify right side
    105,132.38x = 8,326,473,139.66
  5. Step 5: Solve for x
    x = 8,326,473,139.66/105,132.38
  6. Step 6: Final answer
    x = 79,199.89

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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.