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Finding the Fourth Proportional to 103,686.90, 155,415.15 and 56,973.30

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Solution

The fourth proportional to 103,686.90, 155,415.15 and 56,973.30 is: 85,396.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,686.90 : 155,415.15 = 56,973.30 : x
  2. Step 2: Convert to fraction form
    103,686.90/155,415.15 = 56,973.30/x
  3. Step 3: Cross multiply
    103,686.90x = 155,415.15 × 56,973.30
  4. Step 4: Simplify right side
    103,686.90x = 8,854,513,965.50
  5. Step 5: Solve for x
    x = 8,854,513,965.50/103,686.90
  6. Step 6: Final answer
    x = 85,396.65

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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.