Home / 105,091.38-145,026.48-57,345.78

Finding the Fourth Proportional to 105,091.38, 145,026.48 and 57,345.78

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Solution

The fourth proportional to 105,091.38, 145,026.48 and 57,345.78 is: 79,137.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,091.38 : 145,026.48 = 57,345.78 : x
  2. Step 2: Convert to fraction form
    105,091.38/145,026.48 = 57,345.78/x
  3. Step 3: Cross multiply
    105,091.38x = 145,026.48 × 57,345.78
  4. Step 4: Simplify right side
    105,091.38x = 8,316,656,616.25
  5. Step 5: Solve for x
    x = 8,316,656,616.25/105,091.38
  6. Step 6: Final answer
    x = 79,137.38

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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.