Home / 77,205.40-115,808.10-74,143.60

Finding the Fourth Proportional to 77,205.40, 115,808.10 and 74,143.60

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Solution

The fourth proportional to 77,205.40, 115,808.10 and 74,143.60 is: 111,215.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,205.40 : 115,808.10 = 74,143.60 : x
  2. Step 2: Convert to fraction form
    77,205.40/115,808.10 = 74,143.60/x
  3. Step 3: Cross multiply
    77,205.40x = 115,808.10 × 74,143.60
  4. Step 4: Simplify right side
    77,205.40x = 8,586,429,443.16
  5. Step 5: Solve for x
    x = 8,586,429,443.16/77,205.40
  6. Step 6: Final answer
    x = 111,215.40

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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.