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Finding the Fourth Proportional to 105,645.56, 145,790.03 and 57,898.79

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Solution

The fourth proportional to 105,645.56, 145,790.03 and 57,898.79 is: 79,899.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,645.56 : 145,790.03 = 57,898.79 : x
  2. Step 2: Convert to fraction form
    105,645.56/145,790.03 = 57,898.79/x
  3. Step 3: Cross multiply
    105,645.56x = 145,790.03 × 57,898.79
  4. Step 4: Simplify right side
    105,645.56x = 8,441,066,331.06
  5. Step 5: Solve for x
    x = 8,441,066,331.06/105,645.56
  6. Step 6: Final answer
    x = 79,899.87

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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.