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Finding the Fourth Proportional to 66,667.70, 100,038.45 and 39,948.05

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Solution

The fourth proportional to 66,667.70, 100,038.45 and 39,948.05 is: 59,944.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,667.70 : 100,038.45 = 39,948.05 : x
  2. Step 2: Convert to fraction form
    66,667.70/100,038.45 = 39,948.05/x
  3. Step 3: Cross multiply
    66,667.70x = 100,038.45 × 39,948.05
  4. Step 4: Simplify right side
    66,667.70x = 3,996,340,502.33
  5. Step 5: Solve for x
    x = 3,996,340,502.33/66,667.70
  6. Step 6: Final answer
    x = 59,944.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.