Home / 128,931.90-193,281.21-45,806.46

Finding the Fourth Proportional to 128,931.90, 193,281.21 and 45,806.46

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Solution

The fourth proportional to 128,931.90, 193,281.21 and 45,806.46 is: 68,668.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,931.90 : 193,281.21 = 45,806.46 : x
  2. Step 2: Convert to fraction form
    128,931.90/193,281.21 = 45,806.46/x
  3. Step 3: Cross multiply
    128,931.90x = 193,281.21 × 45,806.46
  4. Step 4: Simplify right side
    128,931.90x = 8,853,528,014.62
  5. Step 5: Solve for x
    x = 8,853,528,014.62/128,931.90
  6. Step 6: Final answer
    x = 68,668.25

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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.