Home / 78,302.07-117,452.09-19,138.25

Finding the Fourth Proportional to 78,302.07, 117,452.09 and 19,138.25

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Solution

The fourth proportional to 78,302.07, 117,452.09 and 19,138.25 is: 28,707.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,302.07 : 117,452.09 = 19,138.25 : x
  2. Step 2: Convert to fraction form
    78,302.07/117,452.09 = 19,138.25/x
  3. Step 3: Cross multiply
    78,302.07x = 117,452.09 × 19,138.25
  4. Step 4: Simplify right side
    78,302.07x = 2,247,827,802.92
  5. Step 5: Solve for x
    x = 2,247,827,802.92/78,302.07
  6. Step 6: Final answer
    x = 28,707.13

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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.