Home / 139,133.50-208,697.66-128,298.12

Finding the Fourth Proportional to 139,133.50, 208,697.66 and 128,298.12

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Solution

The fourth proportional to 139,133.50, 208,697.66 and 128,298.12 is: 192,444.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,133.50 : 208,697.66 = 128,298.12 : x
  2. Step 2: Convert to fraction form
    139,133.50/208,697.66 = 128,298.12/x
  3. Step 3: Cross multiply
    139,133.50x = 208,697.66 × 128,298.12
  4. Step 4: Simplify right side
    139,133.50x = 26,775,517,426.40
  5. Step 5: Solve for x
    x = 26,775,517,426.40/139,133.50
  6. Step 6: Final answer
    x = 192,444.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.