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Finding the Fourth Proportional to 99,937,362.33, 137,606,971.64 and 87,477,728.09

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Solution

The fourth proportional to 99,937,362.33, 137,606,971.64 and 87,477,728.09 is: 120,450,900.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,937,362.33 : 137,606,971.64 = 87,477,728.09 : x
  2. Step 2: Convert to fraction form
    99,937,362.33/137,606,971.64 = 87,477,728.09/x
  3. Step 3: Cross multiply
    99,937,362.33x = 137,606,971.64 × 87,477,728.09
  4. Step 4: Simplify right side
    99,937,362.33x = 12,037,545,247,286,836
  5. Step 5: Solve for x
    x = 12,037,545,247,286,836/99,937,362.33
  6. Step 6: Final answer
    x = 120,450,900.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.