Home / 71,612.31-98,821.64-39,783.15

Finding the Fourth Proportional to 71,612.31, 98,821.64 and 39,783.15

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Solution

The fourth proportional to 71,612.31, 98,821.64 and 39,783.15 is: 54,898.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,612.31 : 98,821.64 = 39,783.15 : x
  2. Step 2: Convert to fraction form
    71,612.31/98,821.64 = 39,783.15/x
  3. Step 3: Cross multiply
    71,612.31x = 98,821.64 × 39,783.15
  4. Step 4: Simplify right side
    71,612.31x = 3,931,435,928.45
  5. Step 5: Solve for x
    x = 3,931,435,928.45/71,612.31
  6. Step 6: Final answer
    x = 54,898.88

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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.