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Finding the Fourth Proportional to 100,369.04, 138,509.27 and 55,657.04

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Solution

The fourth proportional to 100,369.04, 138,509.27 and 55,657.04 is: 76,806.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,369.04 : 138,509.27 = 55,657.04 : x
  2. Step 2: Convert to fraction form
    100,369.04/138,509.27 = 55,657.04/x
  3. Step 3: Cross multiply
    100,369.04x = 138,509.27 × 55,657.04
  4. Step 4: Simplify right side
    100,369.04x = 7,709,015,009.93
  5. Step 5: Solve for x
    x = 7,709,015,009.93/100,369.04
  6. Step 6: Final answer
    x = 76,806.71

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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.