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Finding the Fourth Proportional to 143,709.92, 215,590.80 and 64,861.28

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Solution

The fourth proportional to 143,709.92, 215,590.80 and 64,861.28 is: 97,303.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,709.92 : 215,590.80 = 64,861.28 : x
  2. Step 2: Convert to fraction form
    143,709.92/215,590.80 = 64,861.28/x
  3. Step 3: Cross multiply
    143,709.92x = 215,590.80 × 64,861.28
  4. Step 4: Simplify right side
    143,709.92x = 13,983,495,244.22
  5. Step 5: Solve for x
    x = 13,983,495,244.22/143,709.92
  6. Step 6: Final answer
    x = 97,303.62

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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.