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Finding the Fourth Proportional to 145,029.76, 217,261.95 and 81,656.17

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Solution

The fourth proportional to 145,029.76, 217,261.95 and 81,656.17 is: 122,325.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,029.76 : 217,261.95 = 81,656.17 : x
  2. Step 2: Convert to fraction form
    145,029.76/217,261.95 = 81,656.17/x
  3. Step 3: Cross multiply
    145,029.76x = 217,261.95 × 81,656.17
  4. Step 4: Simplify right side
    145,029.76x = 17,740,778,723.73
  5. Step 5: Solve for x
    x = 17,740,778,723.73/145,029.76
  6. Step 6: Final answer
    x = 122,325.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.