Home / 91,140.28-136,709.60-28,810.80

Finding the Fourth Proportional to 91,140.28, 136,709.60 and 28,810.80

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Solution

The fourth proportional to 91,140.28, 136,709.60 and 28,810.80 is: 43,215.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,140.28 : 136,709.60 = 28,810.80 : x
  2. Step 2: Convert to fraction form
    91,140.28/136,709.60 = 28,810.80/x
  3. Step 3: Cross multiply
    91,140.28x = 136,709.60 × 28,810.80
  4. Step 4: Simplify right side
    91,140.28x = 3,938,712,943.68
  5. Step 5: Solve for x
    x = 3,938,712,943.68/91,140.28
  6. Step 6: Final answer
    x = 43,215.94

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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.