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Finding the Fourth Proportional to 72,362,124.60, 108,510,009.30 and 31,951,807.80

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Solution

The fourth proportional to 72,362,124.60, 108,510,009.30 and 31,951,807.80 is: 47,913,061.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,362,124.60 : 108,510,009.30 = 31,951,807.80 : x
  2. Step 2: Convert to fraction form
    72,362,124.60/108,510,009.30 = 31,951,807.80/x
  3. Step 3: Cross multiply
    72,362,124.60x = 108,510,009.30 × 31,951,807.80
  4. Step 4: Simplify right side
    72,362,124.60x = 3,467,090,961,529,812.50
  5. Step 5: Solve for x
    x = 3,467,090,961,529,812.50/72,362,124.60
  6. Step 6: Final answer
    x = 47,913,061.99

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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.