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Finding the Fourth Proportional to 156,207.65, 215,567.55 and 84,587.67

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Solution

The fourth proportional to 156,207.65, 215,567.55 and 84,587.67 is: 116,731.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,207.65 : 215,567.55 = 84,587.67 : x
  2. Step 2: Convert to fraction form
    156,207.65/215,567.55 = 84,587.67/x
  3. Step 3: Cross multiply
    156,207.65x = 215,567.55 × 84,587.67
  4. Step 4: Simplify right side
    156,207.65x = 18,234,356,782.11
  5. Step 5: Solve for x
    x = 18,234,356,782.11/156,207.65
  6. Step 6: Final answer
    x = 116,731.53

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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.