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Finding the Fourth Proportional to 81,649,807.60, 122,474,711.40 and 55,783,721.20

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Solution

The fourth proportional to 81,649,807.60, 122,474,711.40 and 55,783,721.20 is: 83,675,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649,807.60 : 122,474,711.40 = 55,783,721.20 : x
  2. Step 2: Convert to fraction form
    81,649,807.60/122,474,711.40 = 55,783,721.20/x
  3. Step 3: Cross multiply
    81,649,807.60x = 122,474,711.40 × 55,783,721.20
  4. Step 4: Simplify right side
    81,649,807.60x = 6,832,095,154,788,062
  5. Step 5: Solve for x
    x = 6,832,095,154,788,062/81,649,807.60
  6. Step 6: Final answer
    x = 83,675,581.80

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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.