Home / 78,258.61-117,404.70-31,511.53

Finding the Fourth Proportional to 78,258.61, 117,404.70 and 31,511.53

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Solution

The fourth proportional to 78,258.61, 117,404.70 and 31,511.53 is: 47,274.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,258.61 : 117,404.70 = 31,511.53 : x
  2. Step 2: Convert to fraction form
    78,258.61/117,404.70 = 31,511.53/x
  3. Step 3: Cross multiply
    78,258.61x = 117,404.70 × 31,511.53
  4. Step 4: Simplify right side
    78,258.61x = 3,699,601,726.19
  5. Step 5: Solve for x
    x = 3,699,601,726.19/78,258.61
  6. Step 6: Final answer
    x = 47,274.05

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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.