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Finding the Fourth Proportional to 84,697,978.60, 127,141,446.30 and 79,147,372.60

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Solution

The fourth proportional to 84,697,978.60, 127,141,446.30 and 79,147,372.60 is: 118,809,345.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,697,978.60 : 127,141,446.30 = 79,147,372.60 : x
  2. Step 2: Convert to fraction form
    84,697,978.60/127,141,446.30 = 79,147,372.60/x
  3. Step 3: Cross multiply
    84,697,978.60x = 127,141,446.30 × 79,147,372.60
  4. Step 4: Simplify right side
    84,697,978.60x = 10,062,911,423,208,990
  5. Step 5: Solve for x
    x = 10,062,911,423,208,990/84,697,978.60
  6. Step 6: Final answer
    x = 118,809,345.74

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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.