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Finding the Fourth Proportional to 315,899.34, 473,779.14 and 91,211.01

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Solution

The fourth proportional to 315,899.34, 473,779.14 and 91,211.01 is: 136,796.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,899.34 : 473,779.14 = 91,211.01 : x
  2. Step 2: Convert to fraction form
    315,899.34/473,779.14 = 91,211.01/x
  3. Step 3: Cross multiply
    315,899.34x = 473,779.14 × 91,211.01
  4. Step 4: Simplify right side
    315,899.34x = 43,213,873,876.33
  5. Step 5: Solve for x
    x = 43,213,873,876.33/315,899.34
  6. Step 6: Final answer
    x = 136,796.34

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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.