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Finding the Fourth Proportional to 143,715.60, 215,573.40 and 72,856.80

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Solution

The fourth proportional to 143,715.60, 215,573.40 and 72,856.80 is: 109,285.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,715.60 : 215,573.40 = 72,856.80 : x
  2. Step 2: Convert to fraction form
    143,715.60/215,573.40 = 72,856.80/x
  3. Step 3: Cross multiply
    143,715.60x = 215,573.40 × 72,856.80
  4. Step 4: Simplify right side
    143,715.60x = 15,705,988,089.12
  5. Step 5: Solve for x
    x = 15,705,988,089.12/143,715.60
  6. Step 6: Final answer
    x = 109,285.20

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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.