Home / 78,278.64-117,416.60-31,530.32

Finding the Fourth Proportional to 78,278.64, 117,416.60 and 31,530.32

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Solution

The fourth proportional to 78,278.64, 117,416.60 and 31,530.32 is: 47,294.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,278.64 : 117,416.60 = 31,530.32 : x
  2. Step 2: Convert to fraction form
    78,278.64/117,416.60 = 31,530.32/x
  3. Step 3: Cross multiply
    78,278.64x = 117,416.60 × 31,530.32
  4. Step 4: Simplify right side
    78,278.64x = 3,702,182,971.31
  5. Step 5: Solve for x
    x = 3,702,182,971.31/78,278.64
  6. Step 6: Final answer
    x = 47,294.93

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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.