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Finding the Fourth Proportional to 142,706.76, 213,918.67 and 79,555.77

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Solution

The fourth proportional to 142,706.76, 213,918.67 and 79,555.77 is: 119,254.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,706.76 : 213,918.67 = 79,555.77 : x
  2. Step 2: Convert to fraction form
    142,706.76/213,918.67 = 79,555.77/x
  3. Step 3: Cross multiply
    142,706.76x = 213,918.67 × 79,555.77
  4. Step 4: Simplify right side
    142,706.76x = 17,018,464,608.67
  5. Step 5: Solve for x
    x = 17,018,464,608.67/142,706.76
  6. Step 6: Final answer
    x = 119,254.79

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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.