Home / 145,001.78-217,494.01-86,211.57

Finding the Fourth Proportional to 145,001.78, 217,494.01 and 86,211.57

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Solution

The fourth proportional to 145,001.78, 217,494.01 and 86,211.57 is: 129,312.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,001.78 : 217,494.01 = 86,211.57 : x
  2. Step 2: Convert to fraction form
    145,001.78/217,494.01 = 86,211.57/x
  3. Step 3: Cross multiply
    145,001.78x = 217,494.01 × 86,211.57
  4. Step 4: Simplify right side
    145,001.78x = 18,750,500,991.06
  5. Step 5: Solve for x
    x = 18,750,500,991.06/145,001.78
  6. Step 6: Final answer
    x = 129,312.21

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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.