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Finding the Fourth Proportional to 87,994, 121,486.60 and 61,127.44

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Solution

The fourth proportional to 87,994, 121,486.60 and 61,127.44 is: 84,393.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,994 : 121,486.60 = 61,127.44 : x
  2. Step 2: Convert to fraction form
    87,994/121,486.60 = 61,127.44/x
  3. Step 3: Cross multiply
    87,994x = 121,486.60 × 61,127.44
  4. Step 4: Simplify right side
    87,994x = 7,426,164,852.30
  5. Step 5: Solve for x
    x = 7,426,164,852.30/87,994
  6. Step 6: Final answer
    x = 84,393.99

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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.