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Finding the Fourth Proportional to 101,008.79, 139,393.08 and 55,688.36

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Solution

The fourth proportional to 101,008.79, 139,393.08 and 55,688.36 is: 76,850.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,008.79 : 139,393.08 = 55,688.36 : x
  2. Step 2: Convert to fraction form
    101,008.79/139,393.08 = 55,688.36/x
  3. Step 3: Cross multiply
    101,008.79x = 139,393.08 × 55,688.36
  4. Step 4: Simplify right side
    101,008.79x = 7,762,572,020.55
  5. Step 5: Solve for x
    x = 7,762,572,020.55/101,008.79
  6. Step 6: Final answer
    x = 76,850.46

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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.