Home / 90,454.64-135,023.11-83,784.26

Finding the Fourth Proportional to 90,454.64, 135,023.11 and 83,784.26

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Solution

The fourth proportional to 90,454.64, 135,023.11 and 83,784.26 is: 125,066.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,454.64 : 135,023.11 = 83,784.26 : x
  2. Step 2: Convert to fraction form
    90,454.64/135,023.11 = 83,784.26/x
  3. Step 3: Cross multiply
    90,454.64x = 135,023.11 × 83,784.26
  4. Step 4: Simplify right side
    90,454.64x = 11,312,811,354.25
  5. Step 5: Solve for x
    x = 11,312,811,354.25/90,454.64
  6. Step 6: Final answer
    x = 125,066.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.