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Finding the Fourth Proportional to 238,978,095.48, 358,530,932.34 and 85,639,652.28

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Solution

The fourth proportional to 238,978,095.48, 358,530,932.34 and 85,639,652.28 is: 128,482,337.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,978,095.48 : 358,530,932.34 = 85,639,652.28 : x
  2. Step 2: Convert to fraction form
    238,978,095.48/358,530,932.34 = 85,639,652.28/x
  3. Step 3: Cross multiply
    238,978,095.48x = 358,530,932.34 × 85,639,652.28
  4. Step 4: Simplify right side
    238,978,095.48x = 30,704,464,377,221,804
  5. Step 5: Solve for x
    x = 30,704,464,377,221,804/238,978,095.48
  6. Step 6: Final answer
    x = 128,482,337.75

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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.