Home / 105,091.30-145,028.10-57,346.66

Finding the Fourth Proportional to 105,091.30, 145,028.10 and 57,346.66

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Solution

The fourth proportional to 105,091.30, 145,028.10 and 57,346.66 is: 79,139.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,091.30 : 145,028.10 = 57,346.66 : x
  2. Step 2: Convert to fraction form
    105,091.30/145,028.10 = 57,346.66/x
  3. Step 3: Cross multiply
    105,091.30x = 145,028.10 × 57,346.66
  4. Step 4: Simplify right side
    105,091.30x = 8,316,877,141.15
  5. Step 5: Solve for x
    x = 8,316,877,141.15/105,091.30
  6. Step 6: Final answer
    x = 79,139.54

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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.