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Finding the Fourth Proportional to 199,873.86, 275,695.74 and 128,140.26

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Solution

The fourth proportional to 199,873.86, 275,695.74 and 128,140.26 is: 176,750.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,873.86 : 275,695.74 = 128,140.26 : x
  2. Step 2: Convert to fraction form
    199,873.86/275,695.74 = 128,140.26/x
  3. Step 3: Cross multiply
    199,873.86x = 275,695.74 × 128,140.26
  4. Step 4: Simplify right side
    199,873.86x = 35,327,723,804.49
  5. Step 5: Solve for x
    x = 35,327,723,804.49/199,873.86
  6. Step 6: Final answer
    x = 176,750.10

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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.