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Finding the Fourth Proportional to 78,455.99, 117,682.96 and 19,292.18

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Solution

The fourth proportional to 78,455.99, 117,682.96 and 19,292.18 is: 28,938.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,455.99 : 117,682.96 = 19,292.18 : x
  2. Step 2: Convert to fraction form
    78,455.99/117,682.96 = 19,292.18/x
  3. Step 3: Cross multiply
    78,455.99x = 117,682.96 × 19,292.18
  4. Step 4: Simplify right side
    78,455.99x = 2,270,360,210.61
  5. Step 5: Solve for x
    x = 2,270,360,210.61/78,455.99
  6. Step 6: Final answer
    x = 28,938.01

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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.