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Finding the Fourth Proportional to 118,532.70, 163,561.70 and 70,136.10

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Solution

The fourth proportional to 118,532.70, 163,561.70 and 70,136.10 is: 96,779.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,532.70 : 163,561.70 = 70,136.10 : x
  2. Step 2: Convert to fraction form
    118,532.70/163,561.70 = 70,136.10/x
  3. Step 3: Cross multiply
    118,532.70x = 163,561.70 × 70,136.10
  4. Step 4: Simplify right side
    118,532.70x = 11,471,579,747.37
  5. Step 5: Solve for x
    x = 11,471,579,747.37/118,532.70
  6. Step 6: Final answer
    x = 96,779.87

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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.