Home / 128,200.23-176,903.55-74,487.51

Finding the Fourth Proportional to 128,200.23, 176,903.55 and 74,487.51

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Solution

The fourth proportional to 128,200.23, 176,903.55 and 74,487.51 is: 102,785.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,200.23 : 176,903.55 = 74,487.51 : x
  2. Step 2: Convert to fraction form
    128,200.23/176,903.55 = 74,487.51/x
  3. Step 3: Cross multiply
    128,200.23x = 176,903.55 × 74,487.51
  4. Step 4: Simplify right side
    128,200.23x = 13,177,104,949.66
  5. Step 5: Solve for x
    x = 13,177,104,949.66/128,200.23
  6. Step 6: Final answer
    x = 102,785.35

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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.