Home / 211,869.28-292,140-135,287.68

Finding the Fourth Proportional to 211,869.28, 292,140 and 135,287.68

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Solution

The fourth proportional to 211,869.28, 292,140 and 135,287.68 is: 186,544.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,869.28 : 292,140 = 135,287.68 : x
  2. Step 2: Convert to fraction form
    211,869.28/292,140 = 135,287.68/x
  3. Step 3: Cross multiply
    211,869.28x = 292,140 × 135,287.68
  4. Step 4: Simplify right side
    211,869.28x = 39,522,942,835.20
  5. Step 5: Solve for x
    x = 39,522,942,835.20/211,869.28
  6. Step 6: Final answer
    x = 186,544.00

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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.