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Finding the Fourth Proportional to 138,803.87, 208,288.73 and 127,510.76

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Solution

The fourth proportional to 138,803.87, 208,288.73 and 127,510.76 is: 191,342.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,803.87 : 208,288.73 = 127,510.76 : x
  2. Step 2: Convert to fraction form
    138,803.87/208,288.73 = 127,510.76/x
  3. Step 3: Cross multiply
    138,803.87x = 208,288.73 × 127,510.76
  4. Step 4: Simplify right side
    138,803.87x = 26,559,055,101.23
  5. Step 5: Solve for x
    x = 26,559,055,101.23/138,803.87
  6. Step 6: Final answer
    x = 191,342.32

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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.