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Finding the Fourth Proportional to 156,987.79, 235,313.98 and 72,649.78

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Solution

The fourth proportional to 156,987.79, 235,313.98 and 72,649.78 is: 108,897.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,987.79 : 235,313.98 = 72,649.78 : x
  2. Step 2: Convert to fraction form
    156,987.79/235,313.98 = 72,649.78/x
  3. Step 3: Cross multiply
    156,987.79x = 235,313.98 × 72,649.78
  4. Step 4: Simplify right side
    156,987.79x = 17,095,508,108.02
  5. Step 5: Solve for x
    x = 17,095,508,108.02/156,987.79
  6. Step 6: Final answer
    x = 108,897.06

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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.