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Finding the Fourth Proportional to 153,597.33, 211,957.56 and 85,621.77

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Solution

The fourth proportional to 153,597.33, 211,957.56 and 85,621.77 is: 118,154.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,597.33 : 211,957.56 = 85,621.77 : x
  2. Step 2: Convert to fraction form
    153,597.33/211,957.56 = 85,621.77/x
  3. Step 3: Cross multiply
    153,597.33x = 211,957.56 × 85,621.77
  4. Step 4: Simplify right side
    153,597.33x = 18,148,181,452.08
  5. Step 5: Solve for x
    x = 18,148,181,452.08/153,597.33
  6. Step 6: Final answer
    x = 118,154.28

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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.