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Finding the Fourth Proportional to 70,859,893.80, 106,289,840.70 and 53,727,810.60

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Solution

The fourth proportional to 70,859,893.80, 106,289,840.70 and 53,727,810.60 is: 80,591,715.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,859,893.80 : 106,289,840.70 = 53,727,810.60 : x
  2. Step 2: Convert to fraction form
    70,859,893.80/106,289,840.70 = 53,727,810.60/x
  3. Step 3: Cross multiply
    70,859,893.80x = 106,289,840.70 × 53,727,810.60
  4. Step 4: Simplify right side
    70,859,893.80x = 5,710,720,429,833,772
  5. Step 5: Solve for x
    x = 5,710,720,429,833,772/70,859,893.80
  6. Step 6: Final answer
    x = 80,591,715.90

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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.