Home / 90,308.14-135,471.12-31,136.02

Finding the Fourth Proportional to 90,308.14, 135,471.12 and 31,136.02

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Solution

The fourth proportional to 90,308.14, 135,471.12 and 31,136.02 is: 46,707.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,308.14 : 135,471.12 = 31,136.02 : x
  2. Step 2: Convert to fraction form
    90,308.14/135,471.12 = 31,136.02/x
  3. Step 3: Cross multiply
    90,308.14x = 135,471.12 × 31,136.02
  4. Step 4: Simplify right side
    90,308.14x = 4,218,031,501.74
  5. Step 5: Solve for x
    x = 4,218,031,501.74/90,308.14
  6. Step 6: Final answer
    x = 46,707.10

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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.