Home / 78,585.85-117,877.63-19,421.53

Finding the Fourth Proportional to 78,585.85, 117,877.63 and 19,421.53

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Solution

The fourth proportional to 78,585.85, 117,877.63 and 19,421.53 is: 29,132.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,585.85 : 117,877.63 = 19,421.53 : x
  2. Step 2: Convert to fraction form
    78,585.85/117,877.63 = 19,421.53/x
  3. Step 3: Cross multiply
    78,585.85x = 117,877.63 × 19,421.53
  4. Step 4: Simplify right side
    78,585.85x = 2,289,363,620.54
  5. Step 5: Solve for x
    x = 2,289,363,620.54/78,585.85
  6. Step 6: Final answer
    x = 29,132.01

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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.