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Finding the Fourth Proportional to 100,369.66, 138,510.13 and 55,657.66

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Solution

The fourth proportional to 100,369.66, 138,510.13 and 55,657.66 is: 76,807.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,369.66 : 138,510.13 = 55,657.66 : x
  2. Step 2: Convert to fraction form
    100,369.66/138,510.13 = 55,657.66/x
  3. Step 3: Cross multiply
    100,369.66x = 138,510.13 × 55,657.66
  4. Step 4: Simplify right side
    100,369.66x = 7,709,149,722.10
  5. Step 5: Solve for x
    x = 7,709,149,722.10/100,369.66
  6. Step 6: Final answer
    x = 76,807.57

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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.