Home / 78,316.89-117,475.32-19,151.85

Finding the Fourth Proportional to 78,316.89, 117,475.32 and 19,151.85

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Solution

The fourth proportional to 78,316.89, 117,475.32 and 19,151.85 is: 28,727.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,316.89 : 117,475.32 = 19,151.85 : x
  2. Step 2: Convert to fraction form
    78,316.89/117,475.32 = 19,151.85/x
  3. Step 3: Cross multiply
    78,316.89x = 117,475.32 × 19,151.85
  4. Step 4: Simplify right side
    78,316.89x = 2,249,869,707.34
  5. Step 5: Solve for x
    x = 2,249,869,707.34/78,316.89
  6. Step 6: Final answer
    x = 28,727.77

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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.