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Finding the Fourth Proportional to 78,127.59, 117,172.80 and 33,730.05

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Solution

The fourth proportional to 78,127.59, 117,172.80 and 33,730.05 is: 50,587.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,127.59 : 117,172.80 = 33,730.05 : x
  2. Step 2: Convert to fraction form
    78,127.59/117,172.80 = 33,730.05/x
  3. Step 3: Cross multiply
    78,127.59x = 117,172.80 × 33,730.05
  4. Step 4: Simplify right side
    78,127.59x = 3,952,244,402.64
  5. Step 5: Solve for x
    x = 3,952,244,402.64/78,127.59
  6. Step 6: Final answer
    x = 50,587.05

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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.