Home / 211,931.80-317,897.70-54,172.60

Finding the Fourth Proportional to 211,931.80, 317,897.70 and 54,172.60

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Solution

The fourth proportional to 211,931.80, 317,897.70 and 54,172.60 is: 81,258.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,931.80 : 317,897.70 = 54,172.60 : x
  2. Step 2: Convert to fraction form
    211,931.80/317,897.70 = 54,172.60/x
  3. Step 3: Cross multiply
    211,931.80x = 317,897.70 × 54,172.60
  4. Step 4: Simplify right side
    211,931.80x = 17,221,344,943.02
  5. Step 5: Solve for x
    x = 17,221,344,943.02/211,931.80
  6. Step 6: Final answer
    x = 81,258.90

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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.