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Finding the Fourth Proportional to 77,711,979.30, 108,956,023.50 and 77,711,979.30

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Solution

The fourth proportional to 77,711,979.30, 108,956,023.50 and 77,711,979.30 is: 108,956,023.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,711,979.30 : 108,956,023.50 = 77,711,979.30 : x
  2. Step 2: Convert to fraction form
    77,711,979.30/108,956,023.50 = 77,711,979.30/x
  3. Step 3: Cross multiply
    77,711,979.30x = 108,956,023.50 × 77,711,979.30
  4. Step 4: Simplify right side
    77,711,979.30x = 8,467,188,242,842,313
  5. Step 5: Solve for x
    x = 8,467,188,242,842,313/77,711,979.30
  6. Step 6: Final answer
    x = 108,956,023.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.