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Finding the Fourth Proportional to 145,856.70, 218,785.05 and 136,999.35

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Solution

The fourth proportional to 145,856.70, 218,785.05 and 136,999.35 is: 205,499.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,856.70 : 218,785.05 = 136,999.35 : x
  2. Step 2: Convert to fraction form
    145,856.70/218,785.05 = 136,999.35/x
  3. Step 3: Cross multiply
    145,856.70x = 218,785.05 × 136,999.35
  4. Step 4: Simplify right side
    145,856.70x = 29,973,409,639.72
  5. Step 5: Solve for x
    x = 29,973,409,639.72/145,856.70
  6. Step 6: Final answer
    x = 205,499.03

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Similar ratio
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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.