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Finding the Fourth Proportional to 161,689.84, 223,138.70 and 90,069.84

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Solution

The fourth proportional to 161,689.84, 223,138.70 and 90,069.84 is: 124,300.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,689.84 : 223,138.70 = 90,069.84 : x
  2. Step 2: Convert to fraction form
    161,689.84/223,138.70 = 90,069.84/x
  3. Step 3: Cross multiply
    161,689.84x = 223,138.70 × 90,069.84
  4. Step 4: Simplify right side
    161,689.84x = 20,098,066,894.22
  5. Step 5: Solve for x
    x = 20,098,066,894.22/161,689.84
  6. Step 6: Final answer
    x = 124,300.12

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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.