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Finding the Fourth Proportional to 145,412.55, 217,812.65 and 66,593.07

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Solution

The fourth proportional to 145,412.55, 217,812.65 and 66,593.07 is: 99,749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,412.55 : 217,812.65 = 66,593.07 : x
  2. Step 2: Convert to fraction form
    145,412.55/217,812.65 = 66,593.07/x
  3. Step 3: Cross multiply
    145,412.55x = 217,812.65 × 66,593.07
  4. Step 4: Simplify right side
    145,412.55x = 14,504,812,715.37
  5. Step 5: Solve for x
    x = 14,504,812,715.37/145,412.55
  6. Step 6: Final answer
    x = 99,749.39

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1.5x scale

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.