Home / 128,941.29-177,938.51-72,352.53

Finding the Fourth Proportional to 128,941.29, 177,938.51 and 72,352.53

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Solution

The fourth proportional to 128,941.29, 177,938.51 and 72,352.53 is: 99,846.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,941.29 : 177,938.51 = 72,352.53 : x
  2. Step 2: Convert to fraction form
    128,941.29/177,938.51 = 72,352.53/x
  3. Step 3: Cross multiply
    128,941.29x = 177,938.51 × 72,352.53
  4. Step 4: Simplify right side
    128,941.29x = 12,874,301,021.17
  5. Step 5: Solve for x
    x = 12,874,301,021.17/128,941.29
  6. Step 6: Final answer
    x = 99,846.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.