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Finding the Fourth Proportional to 207,915.60, 311,094.90 and 148,082.40

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Solution

The fourth proportional to 207,915.60, 311,094.90 and 148,082.40 is: 221,569.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,915.60 : 311,094.90 = 148,082.40 : x
  2. Step 2: Convert to fraction form
    207,915.60/311,094.90 = 148,082.40/x
  3. Step 3: Cross multiply
    207,915.60x = 311,094.90 × 148,082.40
  4. Step 4: Simplify right side
    207,915.60x = 46,067,679,419.76
  5. Step 5: Solve for x
    x = 46,067,679,419.76/207,915.60
  6. Step 6: Final answer
    x = 221,569.13

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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.