Home / 156,985.90-235,478.85-51,791.20

Finding the Fourth Proportional to 156,985.90, 235,478.85 and 51,791.20

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Solution

The fourth proportional to 156,985.90, 235,478.85 and 51,791.20 is: 77,686.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,985.90 : 235,478.85 = 51,791.20 : x
  2. Step 2: Convert to fraction form
    156,985.90/235,478.85 = 51,791.20/x
  3. Step 3: Cross multiply
    156,985.90x = 235,478.85 × 51,791.20
  4. Step 4: Simplify right side
    156,985.90x = 12,195,732,216.12
  5. Step 5: Solve for x
    x = 12,195,732,216.12/156,985.90
  6. Step 6: Final answer
    x = 77,686.80

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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.