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Finding the Fourth Proportional to 136,709.55, 204,900.30 and 70,115.40

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Solution

The fourth proportional to 136,709.55, 204,900.30 and 70,115.40 is: 105,088.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,709.55 : 204,900.30 = 70,115.40 : x
  2. Step 2: Convert to fraction form
    136,709.55/204,900.30 = 70,115.40/x
  3. Step 3: Cross multiply
    136,709.55x = 204,900.30 × 70,115.40
  4. Step 4: Simplify right side
    136,709.55x = 14,366,666,494.62
  5. Step 5: Solve for x
    x = 14,366,666,494.62/136,709.55
  6. Step 6: Final answer
    x = 105,088.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.