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Finding the Fourth Proportional to 79,143.68, 109,203.09 and 53,670.80

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Solution

The fourth proportional to 79,143.68, 109,203.09 and 53,670.80 is: 74,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,143.68 : 109,203.09 = 53,670.80 : x
  2. Step 2: Convert to fraction form
    79,143.68/109,203.09 = 53,670.80/x
  3. Step 3: Cross multiply
    79,143.68x = 109,203.09 × 53,670.80
  4. Step 4: Simplify right side
    79,143.68x = 5,861,017,274.51
  5. Step 5: Solve for x
    x = 5,861,017,274.51/79,143.68
  6. Step 6: Final answer
    x = 74,055.40

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1.5x scale

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.