Home / 139,834,279.72-192,972,130.68-81,131,898.16

Finding the Fourth Proportional to 139,834,279.72, 192,972,130.68 and 81,131,898.16

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Solution

The fourth proportional to 139,834,279.72, 192,972,130.68 and 81,131,898.16 is: 111,962,497.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,834,279.72 : 192,972,130.68 = 81,131,898.16 : x
  2. Step 2: Convert to fraction form
    139,834,279.72/192,972,130.68 = 81,131,898.16/x
  3. Step 3: Cross multiply
    139,834,279.72x = 192,972,130.68 × 81,131,898.16
  4. Step 4: Simplify right side
    139,834,279.72x = 15,656,195,254,047,972
  5. Step 5: Solve for x
    x = 15,656,195,254,047,972/139,834,279.72
  6. Step 6: Final answer
    x = 111,962,497.93

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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.