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Finding the Fourth Proportional to 278,809.66, 418,213.72 and 79,130.24

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Solution

The fourth proportional to 278,809.66, 418,213.72 and 79,130.24 is: 118,695.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,809.66 : 418,213.72 = 79,130.24 : x
  2. Step 2: Convert to fraction form
    278,809.66/418,213.72 = 79,130.24/x
  3. Step 3: Cross multiply
    278,809.66x = 418,213.72 × 79,130.24
  4. Step 4: Simplify right side
    278,809.66x = 33,093,349,746.00
  5. Step 5: Solve for x
    x = 33,093,349,746.00/278,809.66
  6. Step 6: Final answer
    x = 118,695.13

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1.5x scale

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.