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Finding the Fourth Proportional to 156,720, 235,079.52 and 56,880.06

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Solution

The fourth proportional to 156,720, 235,079.52 and 56,880.06 is: 85,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,720 : 235,079.52 = 56,880.06 : x
  2. Step 2: Convert to fraction form
    156,720/235,079.52 = 56,880.06/x
  3. Step 3: Cross multiply
    156,720x = 235,079.52 × 56,880.06
  4. Step 4: Simplify right side
    156,720x = 13,371,337,202.37
  5. Step 5: Solve for x
    x = 13,371,337,202.37/156,720
  6. Step 6: Final answer
    x = 85,319.92

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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.