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Finding the Fourth Proportional to 153,636.81, 212,020.67 and 89,120.98

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Solution

The fourth proportional to 153,636.81, 212,020.67 and 89,120.98 is: 122,988.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,636.81 : 212,020.67 = 89,120.98 : x
  2. Step 2: Convert to fraction form
    153,636.81/212,020.67 = 89,120.98/x
  3. Step 3: Cross multiply
    153,636.81x = 212,020.67 × 89,120.98
  4. Step 4: Simplify right side
    153,636.81x = 18,895,489,890.66
  5. Step 5: Solve for x
    x = 18,895,489,890.66/153,636.81
  6. Step 6: Final answer
    x = 122,988.04

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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.