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Finding the Fourth Proportional to 145,230.99, 217,531 and 70,193.78

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Solution

The fourth proportional to 145,230.99, 217,531 and 70,193.78 is: 105,138.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,230.99 : 217,531 = 70,193.78 : x
  2. Step 2: Convert to fraction form
    145,230.99/217,531 = 70,193.78/x
  3. Step 3: Cross multiply
    145,230.99x = 217,531 × 70,193.78
  4. Step 4: Simplify right side
    145,230.99x = 15,269,323,157.18
  5. Step 5: Solve for x
    x = 15,269,323,157.18/145,230.99
  6. Step 6: Final answer
    x = 105,138.19

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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.