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Finding the Fourth Proportional to 156,585.90, 234,900.45 and 56,721.90

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Solution

The fourth proportional to 156,585.90, 234,900.45 and 56,721.90 is: 85,090.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,585.90 : 234,900.45 = 56,721.90 : x
  2. Step 2: Convert to fraction form
    156,585.90/234,900.45 = 56,721.90/x
  3. Step 3: Cross multiply
    156,585.90x = 234,900.45 × 56,721.90
  4. Step 4: Simplify right side
    156,585.90x = 13,323,999,834.86
  5. Step 5: Solve for x
    x = 13,323,999,834.86/156,585.90
  6. Step 6: Final answer
    x = 85,090.67

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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.