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Finding the Fourth Proportional to 156,989.98, 216,651.86 and 89,934.94

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Solution

The fourth proportional to 156,989.98, 216,651.86 and 89,934.94 is: 124,113.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,989.98 : 216,651.86 = 89,934.94 : x
  2. Step 2: Convert to fraction form
    156,989.98/216,651.86 = 89,934.94/x
  3. Step 3: Cross multiply
    156,989.98x = 216,651.86 × 89,934.94
  4. Step 4: Simplify right side
    156,989.98x = 19,484,572,029.99
  5. Step 5: Solve for x
    x = 19,484,572,029.99/156,989.98
  6. Step 6: Final answer
    x = 124,113.48

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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.