Home / 78,720.10-118,105.68-47,125.24

Finding the Fourth Proportional to 78,720.10, 118,105.68 and 47,125.24

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Solution

The fourth proportional to 78,720.10, 118,105.68 and 47,125.24 is: 70,703.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,720.10 : 118,105.68 = 47,125.24 : x
  2. Step 2: Convert to fraction form
    78,720.10/118,105.68 = 47,125.24/x
  3. Step 3: Cross multiply
    78,720.10x = 118,105.68 × 47,125.24
  4. Step 4: Simplify right side
    78,720.10x = 5,565,758,515.36
  5. Step 5: Solve for x
    x = 5,565,758,515.36/78,720.10
  6. Step 6: Final answer
    x = 70,703.14

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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.