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Finding the Fourth Proportional to 101,008.57, 139,392.79 and 55,688.21

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Solution

The fourth proportional to 101,008.57, 139,392.79 and 55,688.21 is: 76,850.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,008.57 : 139,392.79 = 55,688.21 : x
  2. Step 2: Convert to fraction form
    101,008.57/139,392.79 = 55,688.21/x
  3. Step 3: Cross multiply
    101,008.57x = 139,392.79 × 55,688.21
  4. Step 4: Simplify right side
    101,008.57x = 7,762,534,962.01
  5. Step 5: Solve for x
    x = 7,762,534,962.01/101,008.57
  6. Step 6: Final answer
    x = 76,850.26

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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.