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Finding the Fourth Proportional to 70,479,958.40, 105,719,937.60 and 65,696,989.40

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Solution

The fourth proportional to 70,479,958.40, 105,719,937.60 and 65,696,989.40 is: 98,545,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,479,958.40 : 105,719,937.60 = 65,696,989.40 : x
  2. Step 2: Convert to fraction form
    70,479,958.40/105,719,937.60 = 65,696,989.40/x
  3. Step 3: Cross multiply
    70,479,958.40x = 105,719,937.60 × 65,696,989.40
  4. Step 4: Simplify right side
    70,479,958.40x = 6,945,481,619,875,861
  5. Step 5: Solve for x
    x = 6,945,481,619,875,861/70,479,958.40
  6. Step 6: Final answer
    x = 98,545,484.10

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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.