Home / 156,931.37-216,562.73-85,313.20

Finding the Fourth Proportional to 156,931.37, 216,562.73 and 85,313.20

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Solution

The fourth proportional to 156,931.37, 216,562.73 and 85,313.20 is: 117,730.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,931.37 : 216,562.73 = 85,313.20 : x
  2. Step 2: Convert to fraction form
    156,931.37/216,562.73 = 85,313.20/x
  3. Step 3: Cross multiply
    156,931.37x = 216,562.73 × 85,313.20
  4. Step 4: Simplify right side
    156,931.37x = 18,475,657,987.66
  5. Step 5: Solve for x
    x = 18,475,657,987.66/156,931.37
  6. Step 6: Final answer
    x = 117,730.81

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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.