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Finding the Fourth Proportional to 253,395.52, 349,681.14 and 138,671.86

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Solution

The fourth proportional to 253,395.52, 349,681.14 and 138,671.86 is: 191,364.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,395.52 : 349,681.14 = 138,671.86 : x
  2. Step 2: Convert to fraction form
    253,395.52/349,681.14 = 138,671.86/x
  3. Step 3: Cross multiply
    253,395.52x = 349,681.14 × 138,671.86
  4. Step 4: Simplify right side
    253,395.52x = 48,490,934,539.11
  5. Step 5: Solve for x
    x = 48,490,934,539.11/253,395.52
  6. Step 6: Final answer
    x = 191,364.61

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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.