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Finding the Fourth Proportional to 101,683.61, 140,331.79 and 56,375.81

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Solution

The fourth proportional to 101,683.61, 140,331.79 and 56,375.81 is: 77,803.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,683.61 : 140,331.79 = 56,375.81 : x
  2. Step 2: Convert to fraction form
    101,683.61/140,331.79 = 56,375.81/x
  3. Step 3: Cross multiply
    101,683.61x = 140,331.79 × 56,375.81
  4. Step 4: Simplify right side
    101,683.61x = 7,911,318,330.00
  5. Step 5: Solve for x
    x = 7,911,318,330.00/101,683.61
  6. Step 6: Final answer
    x = 77,803.28

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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.