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Finding the Fourth Proportional to 78,159.79, 117,238.06 and 18,995.77

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Solution

The fourth proportional to 78,159.79, 117,238.06 and 18,995.77 is: 28,493.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,159.79 : 117,238.06 = 18,995.77 : x
  2. Step 2: Convert to fraction form
    78,159.79/117,238.06 = 18,995.77/x
  3. Step 3: Cross multiply
    78,159.79x = 117,238.06 × 18,995.77
  4. Step 4: Simplify right side
    78,159.79x = 2,227,027,223.01
  5. Step 5: Solve for x
    x = 2,227,027,223.01/78,159.79
  6. Step 6: Final answer
    x = 28,493.26

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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.