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Finding the Fourth Proportional to 268,647.77, 402,971.55 and 79,108.16

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Solution

The fourth proportional to 268,647.77, 402,971.55 and 79,108.16 is: 118,662.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,647.77 : 402,971.55 = 79,108.16 : x
  2. Step 2: Convert to fraction form
    268,647.77/402,971.55 = 79,108.16/x
  3. Step 3: Cross multiply
    268,647.77x = 402,971.55 × 79,108.16
  4. Step 4: Simplify right side
    268,647.77x = 31,878,335,837.99
  5. Step 5: Solve for x
    x = 31,878,335,837.99/268,647.77
  6. Step 6: Final answer
    x = 118,662.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.