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Finding the Fourth Proportional to 112,990.87, 155,929.22 and 65,248.39

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Solution

The fourth proportional to 112,990.87, 155,929.22 and 65,248.39 is: 90,043.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,990.87 : 155,929.22 = 65,248.39 : x
  2. Step 2: Convert to fraction form
    112,990.87/155,929.22 = 65,248.39/x
  3. Step 3: Cross multiply
    112,990.87x = 155,929.22 × 65,248.39
  4. Step 4: Simplify right side
    112,990.87x = 10,174,130,558.96
  5. Step 5: Solve for x
    x = 10,174,130,558.96/112,990.87
  6. Step 6: Final answer
    x = 90,043.83

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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.