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Finding the Fourth Proportional to 112,866.60, 169,690.30 and 105,557.80

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Solution

The fourth proportional to 112,866.60, 169,690.30 and 105,557.80 is: 158,701.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,866.60 : 169,690.30 = 105,557.80 : x
  2. Step 2: Convert to fraction form
    112,866.60/169,690.30 = 105,557.80/x
  3. Step 3: Cross multiply
    112,866.60x = 169,690.30 × 105,557.80
  4. Step 4: Simplify right side
    112,866.60x = 17,912,134,749.34
  5. Step 5: Solve for x
    x = 17,912,134,749.34/112,866.60
  6. Step 6: Final answer
    x = 158,701.82

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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.