Home / 78,340.36-117,510.54-28,427.08

Finding the Fourth Proportional to 78,340.36, 117,510.54 and 28,427.08

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Solution

The fourth proportional to 78,340.36, 117,510.54 and 28,427.08 is: 42,640.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,340.36 : 117,510.54 = 28,427.08 : x
  2. Step 2: Convert to fraction form
    78,340.36/117,510.54 = 28,427.08/x
  3. Step 3: Cross multiply
    78,340.36x = 117,510.54 × 28,427.08
  4. Step 4: Simplify right side
    78,340.36x = 3,340,481,521.42
  5. Step 5: Solve for x
    x = 3,340,481,521.42/78,340.36
  6. Step 6: Final answer
    x = 42,640.62

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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.