Home / 112,712.40-155,705.13-90,021.60

Finding the Fourth Proportional to 112,712.40, 155,705.13 and 90,021.60

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Solution

The fourth proportional to 112,712.40, 155,705.13 and 90,021.60 is: 124,359.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,712.40 : 155,705.13 = 90,021.60 : x
  2. Step 2: Convert to fraction form
    112,712.40/155,705.13 = 90,021.60/x
  3. Step 3: Cross multiply
    112,712.40x = 155,705.13 × 90,021.60
  4. Step 4: Simplify right side
    112,712.40x = 14,016,824,930.81
  5. Step 5: Solve for x
    x = 14,016,824,930.81/112,712.40
  6. Step 6: Final answer
    x = 124,359.21

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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.