Home / 135,705.64-187,209.30-90,404.68

Finding the Fourth Proportional to 135,705.64, 187,209.30 and 90,404.68

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Solution

The fourth proportional to 135,705.64, 187,209.30 and 90,404.68 is: 124,715.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,705.64 : 187,209.30 = 90,404.68 : x
  2. Step 2: Convert to fraction form
    135,705.64/187,209.30 = 90,404.68/x
  3. Step 3: Cross multiply
    135,705.64x = 187,209.30 × 90,404.68
  4. Step 4: Simplify right side
    135,705.64x = 16,924,596,859.52
  5. Step 5: Solve for x
    x = 16,924,596,859.52/135,705.64
  6. Step 6: Final answer
    x = 124,715.50

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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.