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Finding the Fourth Proportional to 78,953.58, 108,956.34 and 43,144.20

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Solution

The fourth proportional to 78,953.58, 108,956.34 and 43,144.20 is: 59,539.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,953.58 : 108,956.34 = 43,144.20 : x
  2. Step 2: Convert to fraction form
    78,953.58/108,956.34 = 43,144.20/x
  3. Step 3: Cross multiply
    78,953.58x = 108,956.34 × 43,144.20
  4. Step 4: Simplify right side
    78,953.58x = 4,700,834,124.23
  5. Step 5: Solve for x
    x = 4,700,834,124.23/78,953.58
  6. Step 6: Final answer
    x = 59,539.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.