Home / 78,587.28-117,881.01-19,422.05

Finding the Fourth Proportional to 78,587.28, 117,881.01 and 19,422.05

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Solution

The fourth proportional to 78,587.28, 117,881.01 and 19,422.05 is: 29,133.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.28 : 117,881.01 = 19,422.05 : x
  2. Step 2: Convert to fraction form
    78,587.28/117,881.01 = 19,422.05/x
  3. Step 3: Cross multiply
    78,587.28x = 117,881.01 × 19,422.05
  4. Step 4: Simplify right side
    78,587.28x = 2,289,490,280.87
  5. Step 5: Solve for x
    x = 2,289,490,280.87/78,587.28
  6. Step 6: Final answer
    x = 29,133.09

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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.