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Finding the Fourth Proportional to 153,615.69, 211,972.55 and 85,627.53

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Solution

The fourth proportional to 153,615.69, 211,972.55 and 85,627.53 is: 118,156.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,615.69 : 211,972.55 = 85,627.53 : x
  2. Step 2: Convert to fraction form
    153,615.69/211,972.55 = 85,627.53/x
  3. Step 3: Cross multiply
    153,615.69x = 211,972.55 × 85,627.53
  4. Step 4: Simplify right side
    153,615.69x = 18,150,685,456.16
  5. Step 5: Solve for x
    x = 18,150,685,456.16/153,615.69
  6. Step 6: Final answer
    x = 118,156.46

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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.