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Finding the Fourth Proportional to 159,328.81, 219,880.02 and 87,715.50

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Solution

The fourth proportional to 159,328.81, 219,880.02 and 87,715.50 is: 121,050.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,328.81 : 219,880.02 = 87,715.50 : x
  2. Step 2: Convert to fraction form
    159,328.81/219,880.02 = 87,715.50/x
  3. Step 3: Cross multiply
    159,328.81x = 219,880.02 × 87,715.50
  4. Step 4: Simplify right side
    159,328.81x = 19,286,885,894.31
  5. Step 5: Solve for x
    x = 19,286,885,894.31/159,328.81
  6. Step 6: Final answer
    x = 121,050.84

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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.