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Finding the Fourth Proportional to 111,045.78, 153,212.85 and 63,281.70

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Solution

The fourth proportional to 111,045.78, 153,212.85 and 63,281.70 is: 87,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,045.78 : 153,212.85 = 63,281.70 : x
  2. Step 2: Convert to fraction form
    111,045.78/153,212.85 = 63,281.70/x
  3. Step 3: Cross multiply
    111,045.78x = 153,212.85 × 63,281.70
  4. Step 4: Simplify right side
    111,045.78x = 9,695,569,609.85
  5. Step 5: Solve for x
    x = 9,695,569,609.85/111,045.78
  6. Step 6: Final answer
    x = 87,311.46

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1.5x scale

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.