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Finding the Fourth Proportional to 96,638.40, 144,842.40 and 40,478.40

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Solution

The fourth proportional to 96,638.40, 144,842.40 and 40,478.40 is: 60,669.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,638.40 : 144,842.40 = 40,478.40 : x
  2. Step 2: Convert to fraction form
    96,638.40/144,842.40 = 40,478.40/x
  3. Step 3: Cross multiply
    96,638.40x = 144,842.40 × 40,478.40
  4. Step 4: Simplify right side
    96,638.40x = 5,862,988,604.16
  5. Step 5: Solve for x
    x = 5,862,988,604.16/96,638.40
  6. Step 6: Final answer
    x = 60,669.35

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1.5x scale

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.