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Finding the Fourth Proportional to 211,537.60, 317,191.20 and 86,737.60

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Solution

The fourth proportional to 211,537.60, 317,191.20 and 86,737.60 is: 130,059.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,537.60 : 317,191.20 = 86,737.60 : x
  2. Step 2: Convert to fraction form
    211,537.60/317,191.20 = 86,737.60/x
  3. Step 3: Cross multiply
    211,537.60x = 317,191.20 × 86,737.60
  4. Step 4: Simplify right side
    211,537.60x = 27,512,403,429.12
  5. Step 5: Solve for x
    x = 27,512,403,429.12/211,537.60
  6. Step 6: Final answer
    x = 130,059.16

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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.