Home / 100,038.90-138,072.15-64,273.62

Finding the Fourth Proportional to 100,038.90, 138,072.15 and 64,273.62

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Solution

The fourth proportional to 100,038.90, 138,072.15 and 64,273.62 is: 88,709.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,038.90 : 138,072.15 = 64,273.62 : x
  2. Step 2: Convert to fraction form
    100,038.90/138,072.15 = 64,273.62/x
  3. Step 3: Cross multiply
    100,038.90x = 138,072.15 × 64,273.62
  4. Step 4: Simplify right side
    100,038.90x = 8,874,396,901.68
  5. Step 5: Solve for x
    x = 8,874,396,901.68/100,038.90
  6. Step 6: Final answer
    x = 88,709.46

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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.