Home / 78,782.52-118,181.13-31,386.12

Finding the Fourth Proportional to 78,782.52, 118,181.13 and 31,386.12

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Solution

The fourth proportional to 78,782.52, 118,181.13 and 31,386.12 is: 47,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,782.52 : 118,181.13 = 31,386.12 : x
  2. Step 2: Convert to fraction form
    78,782.52/118,181.13 = 31,386.12/x
  3. Step 3: Cross multiply
    78,782.52x = 118,181.13 × 31,386.12
  4. Step 4: Simplify right side
    78,782.52x = 3,709,246,567.04
  5. Step 5: Solve for x
    x = 3,709,246,567.04/78,782.52
  6. Step 6: Final answer
    x = 47,082.10

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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.