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Finding the Fourth Proportional to 100,530.70, 150,666.45 and 77,040.70

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Solution

The fourth proportional to 100,530.70, 150,666.45 and 77,040.70 is: 115,461.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,530.70 : 150,666.45 = 77,040.70 : x
  2. Step 2: Convert to fraction form
    100,530.70/150,666.45 = 77,040.70/x
  3. Step 3: Cross multiply
    100,530.70x = 150,666.45 × 77,040.70
  4. Step 4: Simplify right side
    100,530.70x = 11,607,448,774.52
  5. Step 5: Solve for x
    x = 11,607,448,774.52/100,530.70
  6. Step 6: Final answer
    x = 115,461.73

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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.