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Finding the Fourth Proportional to 245,874.30, 368,844.30 and 85,931.70

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Solution

The fourth proportional to 245,874.30, 368,844.30 and 85,931.70 is: 128,909.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,874.30 : 368,844.30 = 85,931.70 : x
  2. Step 2: Convert to fraction form
    245,874.30/368,844.30 = 85,931.70/x
  3. Step 3: Cross multiply
    245,874.30x = 368,844.30 × 85,931.70
  4. Step 4: Simplify right side
    245,874.30x = 31,695,417,734.31
  5. Step 5: Solve for x
    x = 31,695,417,734.31/245,874.30
  6. Step 6: Final answer
    x = 128,909.03

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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.