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Finding the Fourth Proportional to 85,868,616.60, 128,758,601.70 and 25,276,469.40

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Solution

The fourth proportional to 85,868,616.60, 128,758,601.70 and 25,276,469.40 is: 37,901,657.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,868,616.60 : 128,758,601.70 = 25,276,469.40 : x
  2. Step 2: Convert to fraction form
    85,868,616.60/128,758,601.70 = 25,276,469.40/x
  3. Step 3: Cross multiply
    85,868,616.60x = 128,758,601.70 × 25,276,469.40
  4. Step 4: Simplify right side
    85,868,616.60x = 3,254,562,855,856,838
  5. Step 5: Solve for x
    x = 3,254,562,855,856,838/85,868,616.60
  6. Step 6: Final answer
    x = 37,901,657.03

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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.