Home / 78,216.15-117,254.06-28,284.51

Finding the Fourth Proportional to 78,216.15, 117,254.06 and 28,284.51

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Solution

The fourth proportional to 78,216.15, 117,254.06 and 28,284.51 is: 42,401.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,216.15 : 117,254.06 = 28,284.51 : x
  2. Step 2: Convert to fraction form
    78,216.15/117,254.06 = 28,284.51/x
  3. Step 3: Cross multiply
    78,216.15x = 117,254.06 × 28,284.51
  4. Step 4: Simplify right side
    78,216.15x = 3,316,473,491.19
  5. Step 5: Solve for x
    x = 3,316,473,491.19/78,216.15
  6. Step 6: Final answer
    x = 42,401.39

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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.