Home / 260,111.40-390,069.90-102,307.20

Finding the Fourth Proportional to 260,111.40, 390,069.90 and 102,307.20

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Solution

The fourth proportional to 260,111.40, 390,069.90 and 102,307.20 is: 153,422.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,111.40 : 390,069.90 = 102,307.20 : x
  2. Step 2: Convert to fraction form
    260,111.40/390,069.90 = 102,307.20/x
  3. Step 3: Cross multiply
    260,111.40x = 390,069.90 × 102,307.20
  4. Step 4: Simplify right side
    260,111.40x = 39,906,959,273.28
  5. Step 5: Solve for x
    x = 39,906,959,273.28/260,111.40
  6. Step 6: Final answer
    x = 153,422.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.