Home / 128,341.95-177,102.90-74,623.16

Finding the Fourth Proportional to 128,341.95, 177,102.90 and 74,623.16

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Solution

The fourth proportional to 128,341.95, 177,102.90 and 74,623.16 is: 102,974.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,341.95 : 177,102.90 = 74,623.16 : x
  2. Step 2: Convert to fraction form
    128,341.95/177,102.90 = 74,623.16/x
  3. Step 3: Cross multiply
    128,341.95x = 177,102.90 × 74,623.16
  4. Step 4: Simplify right side
    128,341.95x = 13,215,978,043.16
  5. Step 5: Solve for x
    x = 13,215,978,043.16/128,341.95
  6. Step 6: Final answer
    x = 102,974.73

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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.