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Finding the Fourth Proportional to 57,172.80, 78,873.60 and 35,918.40

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Solution

The fourth proportional to 57,172.80, 78,873.60 and 35,918.40 is: 49,551.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,172.80 : 78,873.60 = 35,918.40 : x
  2. Step 2: Convert to fraction form
    57,172.80/78,873.60 = 35,918.40/x
  3. Step 3: Cross multiply
    57,172.80x = 78,873.60 × 35,918.40
  4. Step 4: Simplify right side
    57,172.80x = 2,833,013,514.24
  5. Step 5: Solve for x
    x = 2,833,013,514.24/57,172.80
  6. Step 6: Final answer
    x = 49,551.77

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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.