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Finding the Fourth Proportional to 100,852.94, 139,171.90 and 55,522.20

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Solution

The fourth proportional to 100,852.94, 139,171.90 and 55,522.20 is: 76,617.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,852.94 : 139,171.90 = 55,522.20 : x
  2. Step 2: Convert to fraction form
    100,852.94/139,171.90 = 55,522.20/x
  3. Step 3: Cross multiply
    100,852.94x = 139,171.90 × 55,522.20
  4. Step 4: Simplify right side
    100,852.94x = 7,727,130,066.18
  5. Step 5: Solve for x
    x = 7,727,130,066.18/100,852.94
  6. Step 6: Final answer
    x = 76,617.80

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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.