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Finding the Fourth Proportional to 143,333.68, 197,802.84 and 78,805.64

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Solution

The fourth proportional to 143,333.68, 197,802.84 and 78,805.64 is: 108,753.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,333.68 : 197,802.84 = 78,805.64 : x
  2. Step 2: Convert to fraction form
    143,333.68/197,802.84 = 78,805.64/x
  3. Step 3: Cross multiply
    143,333.68x = 197,802.84 × 78,805.64
  4. Step 4: Simplify right side
    143,333.68x = 15,587,979,400.02
  5. Step 5: Solve for x
    x = 15,587,979,400.02/143,333.68
  6. Step 6: Final answer
    x = 108,753.08

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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.