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Finding the Fourth Proportional to 242,449.91, 334,551.47 and 139,078.77

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Solution

The fourth proportional to 242,449.91, 334,551.47 and 139,078.77 is: 191,911.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,449.91 : 334,551.47 = 139,078.77 : x
  2. Step 2: Convert to fraction form
    242,449.91/334,551.47 = 139,078.77/x
  3. Step 3: Cross multiply
    242,449.91x = 334,551.47 × 139,078.77
  4. Step 4: Simplify right side
    242,449.91x = 46,529,006,881.18
  5. Step 5: Solve for x
    x = 46,529,006,881.18/242,449.91
  6. Step 6: Final answer
    x = 191,911.83

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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.