Home / 78,038.68-116,988.18-28,107.04

Finding the Fourth Proportional to 78,038.68, 116,988.18 and 28,107.04

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Solution

The fourth proportional to 78,038.68, 116,988.18 and 28,107.04 is: 42,135.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,038.68 : 116,988.18 = 28,107.04 : x
  2. Step 2: Convert to fraction form
    78,038.68/116,988.18 = 28,107.04/x
  3. Step 3: Cross multiply
    78,038.68x = 116,988.18 × 28,107.04
  4. Step 4: Simplify right side
    78,038.68x = 3,288,191,454.79
  5. Step 5: Solve for x
    x = 3,288,191,454.79/78,038.68
  6. Step 6: Final answer
    x = 42,135.41

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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.