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Finding the Fourth Proportional to 103,999.95, 155,858.58 and 43,978.55

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Solution

The fourth proportional to 103,999.95, 155,858.58 and 43,978.55 is: 65,908.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,999.95 : 155,858.58 = 43,978.55 : x
  2. Step 2: Convert to fraction form
    103,999.95/155,858.58 = 43,978.55/x
  3. Step 3: Cross multiply
    103,999.95x = 155,858.58 × 43,978.55
  4. Step 4: Simplify right side
    103,999.95x = 6,854,433,574.17
  5. Step 5: Solve for x
    x = 6,854,433,574.17/103,999.95
  6. Step 6: Final answer
    x = 65,908.05

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1.5x scale

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.