Home / 128,539.42-177,386.29-74,061.55

Finding the Fourth Proportional to 128,539.42, 177,386.29 and 74,061.55

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Solution

The fourth proportional to 128,539.42, 177,386.29 and 74,061.55 is: 102,206.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,539.42 : 177,386.29 = 74,061.55 : x
  2. Step 2: Convert to fraction form
    128,539.42/177,386.29 = 74,061.55/x
  3. Step 3: Cross multiply
    128,539.42x = 177,386.29 × 74,061.55
  4. Step 4: Simplify right side
    128,539.42x = 13,137,503,622.73
  5. Step 5: Solve for x
    x = 13,137,503,622.73/128,539.42
  6. Step 6: Final answer
    x = 102,206.03

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1.5x scale

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.