Home / 90,583.74-135,875.61-31,419.45

Finding the Fourth Proportional to 90,583.74, 135,875.61 and 31,419.45

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Solution

The fourth proportional to 90,583.74, 135,875.61 and 31,419.45 is: 47,129.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,583.74 : 135,875.61 = 31,419.45 : x
  2. Step 2: Convert to fraction form
    90,583.74/135,875.61 = 31,419.45/x
  3. Step 3: Cross multiply
    90,583.74x = 135,875.61 × 31,419.45
  4. Step 4: Simplify right side
    90,583.74x = 4,269,136,934.61
  5. Step 5: Solve for x
    x = 4,269,136,934.61/90,583.74
  6. Step 6: Final answer
    x = 47,129.18

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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.