Home / 145,815.89-201,225.92-78,747.89

Finding the Fourth Proportional to 145,815.89, 201,225.92 and 78,747.89

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Solution

The fourth proportional to 145,815.89, 201,225.92 and 78,747.89 is: 108,672.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,815.89 : 201,225.92 = 78,747.89 : x
  2. Step 2: Convert to fraction form
    145,815.89/201,225.92 = 78,747.89/x
  3. Step 3: Cross multiply
    145,815.89x = 201,225.92 × 78,747.89
  4. Step 4: Simplify right side
    145,815.89x = 15,846,115,213.44
  5. Step 5: Solve for x
    x = 15,846,115,213.44/145,815.89
  6. Step 6: Final answer
    x = 108,672.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.