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Finding the Fourth Proportional to 70,008,927.60, 105,013,391.40 and 60,435,116.40

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Solution

The fourth proportional to 70,008,927.60, 105,013,391.40 and 60,435,116.40 is: 90,652,674.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,008,927.60 : 105,013,391.40 = 60,435,116.40 : x
  2. Step 2: Convert to fraction form
    70,008,927.60/105,013,391.40 = 60,435,116.40/x
  3. Step 3: Cross multiply
    70,008,927.60x = 105,013,391.40 × 60,435,116.40
  4. Step 4: Simplify right side
    70,008,927.60x = 6,346,496,532,817,759
  5. Step 5: Solve for x
    x = 6,346,496,532,817,759/70,008,927.60
  6. Step 6: Final answer
    x = 90,652,674.60

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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.