Home / 78,322.45-117,457.32-28,392.10

Finding the Fourth Proportional to 78,322.45, 117,457.32 and 28,392.10

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Solution

The fourth proportional to 78,322.45, 117,457.32 and 28,392.10 is: 42,578.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,322.45 : 117,457.32 = 28,392.10 : x
  2. Step 2: Convert to fraction form
    78,322.45/117,457.32 = 28,392.10/x
  3. Step 3: Cross multiply
    78,322.45x = 117,457.32 × 28,392.10
  4. Step 4: Simplify right side
    78,322.45x = 3,334,859,975.17
  5. Step 5: Solve for x
    x = 3,334,859,975.17/78,322.45
  6. Step 6: Final answer
    x = 42,578.60

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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.