Home / 100,334.72-138,555.65-64,586.86

Finding the Fourth Proportional to 100,334.72, 138,555.65 and 64,586.86

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Solution

The fourth proportional to 100,334.72, 138,555.65 and 64,586.86 is: 89,190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,334.72 : 138,555.65 = 64,586.86 : x
  2. Step 2: Convert to fraction form
    100,334.72/138,555.65 = 64,586.86/x
  3. Step 3: Cross multiply
    100,334.72x = 138,555.65 × 64,586.86
  4. Step 4: Simplify right side
    100,334.72x = 8,948,874,368.76
  5. Step 5: Solve for x
    x = 8,948,874,368.76/100,334.72
  6. Step 6: Final answer
    x = 89,190.21

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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.