Home / 128,352.42-177,055.24-74,631.50

Finding the Fourth Proportional to 128,352.42, 177,055.24 and 74,631.50

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Solution

The fourth proportional to 128,352.42, 177,055.24 and 74,631.50 is: 102,950.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,352.42 : 177,055.24 = 74,631.50 : x
  2. Step 2: Convert to fraction form
    128,352.42/177,055.24 = 74,631.50/x
  3. Step 3: Cross multiply
    128,352.42x = 177,055.24 × 74,631.50
  4. Step 4: Simplify right side
    128,352.42x = 13,213,898,144.06
  5. Step 5: Solve for x
    x = 13,213,898,144.06/128,352.42
  6. Step 6: Final answer
    x = 102,950.13

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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.