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Finding the Fourth Proportional to 156,551.81, 216,041.57 and 84,931.81

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Solution

The fourth proportional to 156,551.81, 216,041.57 and 84,931.81 is: 117,205.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,551.81 : 216,041.57 = 84,931.81 : x
  2. Step 2: Convert to fraction form
    156,551.81/216,041.57 = 84,931.81/x
  3. Step 3: Cross multiply
    156,551.81x = 216,041.57 × 84,931.81
  4. Step 4: Simplify right side
    156,551.81x = 18,348,801,035.24
  5. Step 5: Solve for x
    x = 18,348,801,035.24/156,551.81
  6. Step 6: Final answer
    x = 117,205.94

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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.