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Finding the Fourth Proportional to 145,169.80, 217,791.78 and 70,325.80

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Solution

The fourth proportional to 145,169.80, 217,791.78 and 70,325.80 is: 105,506.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,169.80 : 217,791.78 = 70,325.80 : x
  2. Step 2: Convert to fraction form
    145,169.80/217,791.78 = 70,325.80/x
  3. Step 3: Cross multiply
    145,169.80x = 217,791.78 × 70,325.80
  4. Step 4: Simplify right side
    145,169.80x = 15,316,381,161.92
  5. Step 5: Solve for x
    x = 15,316,381,161.92/145,169.80
  6. Step 6: Final answer
    x = 105,506.66

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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.