Home / 145,815.78-201,225.75-78,747.78

Finding the Fourth Proportional to 145,815.78, 201,225.75 and 78,747.78

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Solution

The fourth proportional to 145,815.78, 201,225.75 and 78,747.78 is: 108,671.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,815.78 : 201,225.75 = 78,747.78 : x
  2. Step 2: Convert to fraction form
    145,815.78/201,225.75 = 78,747.78/x
  3. Step 3: Cross multiply
    145,815.78x = 201,225.75 × 78,747.78
  4. Step 4: Simplify right side
    145,815.78x = 15,846,081,091.34
  5. Step 5: Solve for x
    x = 15,846,081,091.34/145,815.78
  6. Step 6: Final answer
    x = 108,671.92

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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.