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Finding the Fourth Proportional to 139,737.72, 192,841.53 and 76,079.01

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Solution

The fourth proportional to 139,737.72, 192,841.53 and 76,079.01 is: 104,990.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,737.72 : 192,841.53 = 76,079.01 : x
  2. Step 2: Convert to fraction form
    139,737.72/192,841.53 = 76,079.01/x
  3. Step 3: Cross multiply
    139,737.72x = 192,841.53 × 76,079.01
  4. Step 4: Simplify right side
    139,737.72x = 14,671,193,127.14
  5. Step 5: Solve for x
    x = 14,671,193,127.14/139,737.72
  6. Step 6: Final answer
    x = 104,990.93

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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.