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Finding the Fourth Proportional to 155,612.70, 214,742.70 and 87,629.40

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Solution

The fourth proportional to 155,612.70, 214,742.70 and 87,629.40 is: 120,926.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,612.70 : 214,742.70 = 87,629.40 : x
  2. Step 2: Convert to fraction form
    155,612.70/214,742.70 = 87,629.40/x
  3. Step 3: Cross multiply
    155,612.70x = 214,742.70 × 87,629.40
  4. Step 4: Simplify right side
    155,612.70x = 18,817,773,955.38
  5. Step 5: Solve for x
    x = 18,817,773,955.38/155,612.70
  6. Step 6: Final answer
    x = 120,926.98

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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.