Home / 153,690.12-212,093.58-85,711.50

Finding the Fourth Proportional to 153,690.12, 212,093.58 and 85,711.50

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Solution

The fourth proportional to 153,690.12, 212,093.58 and 85,711.50 is: 118,282.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,690.12 : 212,093.58 = 85,711.50 : x
  2. Step 2: Convert to fraction form
    153,690.12/212,093.58 = 85,711.50/x
  3. Step 3: Cross multiply
    153,690.12x = 212,093.58 × 85,711.50
  4. Step 4: Simplify right side
    153,690.12x = 18,178,858,882.17
  5. Step 5: Solve for x
    x = 18,178,858,882.17/153,690.12
  6. Step 6: Final answer
    x = 118,282.55

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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.