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Finding the Fourth Proportional to 209,430.44, 289,073.43 and 123,439.40

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Solution

The fourth proportional to 209,430.44, 289,073.43 and 123,439.40 is: 170,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,430.44 : 289,073.43 = 123,439.40 : x
  2. Step 2: Convert to fraction form
    209,430.44/289,073.43 = 123,439.40/x
  3. Step 3: Cross multiply
    209,430.44x = 289,073.43 × 123,439.40
  4. Step 4: Simplify right side
    209,430.44x = 35,683,050,755.14
  5. Step 5: Solve for x
    x = 35,683,050,755.14/209,430.44
  6. Step 6: Final answer
    x = 170,381.40

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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.