Home / 78,239.31-117,307.14-28,312.92

Finding the Fourth Proportional to 78,239.31, 117,307.14 and 28,312.92

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Solution

The fourth proportional to 78,239.31, 117,307.14 and 28,312.92 is: 42,450.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,239.31 : 117,307.14 = 28,312.92 : x
  2. Step 2: Convert to fraction form
    78,239.31/117,307.14 = 28,312.92/x
  3. Step 3: Cross multiply
    78,239.31x = 117,307.14 × 28,312.92
  4. Step 4: Simplify right side
    78,239.31x = 3,321,307,670.25
  5. Step 5: Solve for x
    x = 3,321,307,670.25/78,239.31
  6. Step 6: Final answer
    x = 42,450.63

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1.5x scale

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.