Home / 78,913.14-118,369.66-19,748.78

Finding the Fourth Proportional to 78,913.14, 118,369.66 and 19,748.78

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Solution

The fourth proportional to 78,913.14, 118,369.66 and 19,748.78 is: 29,623.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,913.14 : 118,369.66 = 19,748.78 : x
  2. Step 2: Convert to fraction form
    78,913.14/118,369.66 = 19,748.78/x
  3. Step 3: Cross multiply
    78,913.14x = 118,369.66 × 19,748.78
  4. Step 4: Simplify right side
    78,913.14x = 2,337,655,782.17
  5. Step 5: Solve for x
    x = 2,337,655,782.17/78,913.14
  6. Step 6: Final answer
    x = 29,623.15

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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.