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Finding the Fourth Proportional to 100,995.74, 139,374.08 and 55,674.47

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Solution

The fourth proportional to 100,995.74, 139,374.08 and 55,674.47 is: 76,830.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,995.74 : 139,374.08 = 55,674.47 : x
  2. Step 2: Convert to fraction form
    100,995.74/139,374.08 = 55,674.47/x
  3. Step 3: Cross multiply
    100,995.74x = 139,374.08 × 55,674.47
  4. Step 4: Simplify right side
    100,995.74x = 7,759,577,478.05
  5. Step 5: Solve for x
    x = 7,759,577,478.05/100,995.74
  6. Step 6: Final answer
    x = 76,830.74

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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.