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Finding the Fourth Proportional to 156,990.70, 216,652.89 and 89,935.66

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Solution

The fourth proportional to 156,990.70, 216,652.89 and 89,935.66 is: 124,114.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,990.70 : 216,652.89 = 89,935.66 : x
  2. Step 2: Convert to fraction form
    156,990.70/216,652.89 = 89,935.66/x
  3. Step 3: Cross multiply
    156,990.70x = 216,652.89 × 89,935.66
  4. Step 4: Simplify right side
    156,990.70x = 19,484,820,653.06
  5. Step 5: Solve for x
    x = 19,484,820,653.06/156,990.70
  6. Step 6: Final answer
    x = 124,114.49

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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.