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Finding the Fourth Proportional to 105,561.92, 145,675.50 and 57,818.28

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Solution

The fourth proportional to 105,561.92, 145,675.50 and 57,818.28 is: 79,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,561.92 : 145,675.50 = 57,818.28 : x
  2. Step 2: Convert to fraction form
    105,561.92/145,675.50 = 57,818.28/x
  3. Step 3: Cross multiply
    105,561.92x = 145,675.50 × 57,818.28
  4. Step 4: Simplify right side
    105,561.92x = 8,422,706,848.14
  5. Step 5: Solve for x
    x = 8,422,706,848.14/105,561.92
  6. Step 6: Final answer
    x = 79,789.25

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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.