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Finding the Fourth Proportional to 310,542.12, 465,814.80 and 85,903.20

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Solution

The fourth proportional to 310,542.12, 465,814.80 and 85,903.20 is: 128,855.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,542.12 : 465,814.80 = 85,903.20 : x
  2. Step 2: Convert to fraction form
    310,542.12/465,814.80 = 85,903.20/x
  3. Step 3: Cross multiply
    310,542.12x = 465,814.80 × 85,903.20
  4. Step 4: Simplify right side
    310,542.12x = 40,014,981,927.36
  5. Step 5: Solve for x
    x = 40,014,981,927.36/310,542.12
  6. Step 6: Final answer
    x = 128,855.25

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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.