Home / 125,585.16-189,120.54-90,768.12

Finding the Fourth Proportional to 125,585.16, 189,120.54 and 90,768.12

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Solution

The fourth proportional to 125,585.16, 189,120.54 and 90,768.12 is: 136,689.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,585.16 : 189,120.54 = 90,768.12 : x
  2. Step 2: Convert to fraction form
    125,585.16/189,120.54 = 90,768.12/x
  3. Step 3: Cross multiply
    125,585.16x = 189,120.54 × 90,768.12
  4. Step 4: Simplify right side
    125,585.16x = 17,166,115,869.18
  5. Step 5: Solve for x
    x = 17,166,115,869.18/125,585.16
  6. Step 6: Final answer
    x = 136,689.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.