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Finding the Fourth Proportional to 138,954.40, 191,748 and 88,648

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Solution

The fourth proportional to 138,954.40, 191,748 and 88,648 is: 122,328.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,954.40 : 191,748 = 88,648 : x
  2. Step 2: Convert to fraction form
    138,954.40/191,748 = 88,648/x
  3. Step 3: Cross multiply
    138,954.40x = 191,748 × 88,648
  4. Step 4: Simplify right side
    138,954.40x = 16,998,076,704
  5. Step 5: Solve for x
    x = 16,998,076,704/138,954.40
  6. Step 6: Final answer
    x = 122,328.45

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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.