Home / 128,566.90-177,433.30-74,868.76

Finding the Fourth Proportional to 128,566.90, 177,433.30 and 74,868.76

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Solution

The fourth proportional to 128,566.90, 177,433.30 and 74,868.76 is: 103,325.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,566.90 : 177,433.30 = 74,868.76 : x
  2. Step 2: Convert to fraction form
    128,566.90/177,433.30 = 74,868.76/x
  3. Step 3: Cross multiply
    128,566.90x = 177,433.30 × 74,868.76
  4. Step 4: Simplify right side
    128,566.90x = 13,284,211,153.71
  5. Step 5: Solve for x
    x = 13,284,211,153.71/128,566.90
  6. Step 6: Final answer
    x = 103,325.28

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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.