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Finding the Fourth Proportional to 70,008,918.60, 105,013,377.90 and 60,435,107.40

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Solution

The fourth proportional to 70,008,918.60, 105,013,377.90 and 60,435,107.40 is: 90,652,661.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,008,918.60 : 105,013,377.90 = 60,435,107.40 : x
  2. Step 2: Convert to fraction form
    70,008,918.60/105,013,377.90 = 60,435,107.40/x
  3. Step 3: Cross multiply
    70,008,918.60x = 105,013,377.90 × 60,435,107.40
  4. Step 4: Simplify right side
    70,008,918.60x = 6,346,494,771,823,287
  5. Step 5: Solve for x
    x = 6,346,494,771,823,287/70,008,918.60
  6. Step 6: Final answer
    x = 90,652,661.10

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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.