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Finding the Fourth Proportional to 153,967.88, 212,463.55 and 85,979.54

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Solution

The fourth proportional to 153,967.88, 212,463.55 and 85,979.54 is: 118,644.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,967.88 : 212,463.55 = 85,979.54 : x
  2. Step 2: Convert to fraction form
    153,967.88/212,463.55 = 85,979.54/x
  3. Step 3: Cross multiply
    153,967.88x = 212,463.55 × 85,979.54
  4. Step 4: Simplify right side
    153,967.88x = 18,267,518,295.77
  5. Step 5: Solve for x
    x = 18,267,518,295.77/153,967.88
  6. Step 6: Final answer
    x = 118,644.99

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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.