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Finding the Fourth Proportional to 105,603.96, 145,614.06 and 67,312.44

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Solution

The fourth proportional to 105,603.96, 145,614.06 and 67,312.44 is: 92,815.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,603.96 : 145,614.06 = 67,312.44 : x
  2. Step 2: Convert to fraction form
    105,603.96/145,614.06 = 67,312.44/x
  3. Step 3: Cross multiply
    105,603.96x = 145,614.06 × 67,312.44
  4. Step 4: Simplify right side
    105,603.96x = 9,801,637,676.91
  5. Step 5: Solve for x
    x = 9,801,637,676.91/105,603.96
  6. Step 6: Final answer
    x = 92,815.06

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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.