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Finding the Fourth Proportional to 208,603.26, 312,801.38 and 66,430.01

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Solution

The fourth proportional to 208,603.26, 312,801.38 and 66,430.01 is: 99,612.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,603.26 : 312,801.38 = 66,430.01 : x
  2. Step 2: Convert to fraction form
    208,603.26/312,801.38 = 66,430.01/x
  3. Step 3: Cross multiply
    208,603.26x = 312,801.38 × 66,430.01
  4. Step 4: Simplify right side
    208,603.26x = 20,779,396,905.26
  5. Step 5: Solve for x
    x = 20,779,396,905.26/208,603.26
  6. Step 6: Final answer
    x = 99,612.04

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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.