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Finding the Fourth Proportional to 88,392, 121,981.20 and 48,648

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Solution

The fourth proportional to 88,392, 121,981.20 and 48,648 is: 67,134.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,392 : 121,981.20 = 48,648 : x
  2. Step 2: Convert to fraction form
    88,392/121,981.20 = 48,648/x
  3. Step 3: Cross multiply
    88,392x = 121,981.20 × 48,648
  4. Step 4: Simplify right side
    88,392x = 5,934,141,417.60
  5. Step 5: Solve for x
    x = 5,934,141,417.60/88,392
  6. Step 6: Final answer
    x = 67,134.37

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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.