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Finding the Fourth Proportional to 109,218.60, 150,715.26 and 61,470

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Solution

The fourth proportional to 109,218.60, 150,715.26 and 61,470 is: 84,824.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,218.60 : 150,715.26 = 61,470 : x
  2. Step 2: Convert to fraction form
    109,218.60/150,715.26 = 61,470/x
  3. Step 3: Cross multiply
    109,218.60x = 150,715.26 × 61,470
  4. Step 4: Simplify right side
    109,218.60x = 9,264,467,032.20
  5. Step 5: Solve for x
    x = 9,264,467,032.20/109,218.60
  6. Step 6: Final answer
    x = 84,824.99

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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.