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Finding the Fourth Proportional to 423,679.51, 635,437.10 and 120,071.06

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Solution

The fourth proportional to 423,679.51, 635,437.10 and 120,071.06 is: 180,083.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,679.51 : 635,437.10 = 120,071.06 : x
  2. Step 2: Convert to fraction form
    423,679.51/635,437.10 = 120,071.06/x
  3. Step 3: Cross multiply
    423,679.51x = 635,437.10 × 120,071.06
  4. Step 4: Simplify right side
    423,679.51x = 76,297,605,666.21
  5. Step 5: Solve for x
    x = 76,297,605,666.21/423,679.51
  6. Step 6: Final answer
    x = 180,083.30

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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.