Home / 78,148.48-117,284.70-40,719.19

Finding the Fourth Proportional to 78,148.48, 117,284.70 and 40,719.19

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Solution

The fourth proportional to 78,148.48, 117,284.70 and 40,719.19 is: 61,111.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,148.48 : 117,284.70 = 40,719.19 : x
  2. Step 2: Convert to fraction form
    78,148.48/117,284.70 = 40,719.19/x
  3. Step 3: Cross multiply
    78,148.48x = 117,284.70 × 40,719.19
  4. Step 4: Simplify right side
    78,148.48x = 4,775,737,983.39
  5. Step 5: Solve for x
    x = 4,775,737,983.39/78,148.48
  6. Step 6: Final answer
    x = 61,111.08

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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.