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Finding the Fourth Proportional to 105,561.66, 145,678.59 and 57,817.62

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Solution

The fourth proportional to 105,561.66, 145,678.59 and 57,817.62 is: 79,790.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,561.66 : 145,678.59 = 57,817.62 : x
  2. Step 2: Convert to fraction form
    105,561.66/145,678.59 = 57,817.62/x
  3. Step 3: Cross multiply
    105,561.66x = 145,678.59 × 57,817.62
  4. Step 4: Simplify right side
    105,561.66x = 8,422,789,358.76
  5. Step 5: Solve for x
    x = 8,422,789,358.76/105,561.66
  6. Step 6: Final answer
    x = 79,790.23

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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.