Home / 123,731.80-170,740.48-72,746.60

Finding the Fourth Proportional to 123,731.80, 170,740.48 and 72,746.60

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Solution

The fourth proportional to 123,731.80, 170,740.48 and 72,746.60 is: 100,384.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,731.80 : 170,740.48 = 72,746.60 : x
  2. Step 2: Convert to fraction form
    123,731.80/170,740.48 = 72,746.60/x
  3. Step 3: Cross multiply
    123,731.80x = 170,740.48 × 72,746.60
  4. Step 4: Simplify right side
    123,731.80x = 12,420,789,402.37
  5. Step 5: Solve for x
    x = 12,420,789,402.37/123,731.80
  6. Step 6: Final answer
    x = 100,384.78

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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.