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Finding the Fourth Proportional to 91,536.66, 136,903.23 and 79,678.74

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Solution

The fourth proportional to 91,536.66, 136,903.23 and 79,678.74 is: 119,168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,536.66 : 136,903.23 = 79,678.74 : x
  2. Step 2: Convert to fraction form
    91,536.66/136,903.23 = 79,678.74/x
  3. Step 3: Cross multiply
    91,536.66x = 136,903.23 × 79,678.74
  4. Step 4: Simplify right side
    91,536.66x = 10,908,276,868.33
  5. Step 5: Solve for x
    x = 10,908,276,868.33/91,536.66
  6. Step 6: Final answer
    x = 119,168.40

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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.