Home / 71,521.18-98,698.30-39,689.40

Finding the Fourth Proportional to 71,521.18, 98,698.30 and 39,689.40

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Solution

The fourth proportional to 71,521.18, 98,698.30 and 39,689.40 is: 54,770.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,521.18 : 98,698.30 = 39,689.40 : x
  2. Step 2: Convert to fraction form
    71,521.18/98,698.30 = 39,689.40/x
  3. Step 3: Cross multiply
    71,521.18x = 98,698.30 × 39,689.40
  4. Step 4: Simplify right side
    71,521.18x = 3,917,276,308.02
  5. Step 5: Solve for x
    x = 3,917,276,308.02/71,521.18
  6. Step 6: Final answer
    x = 54,770.86

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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.