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Finding the Fourth Proportional to 72,772.80, 100,419.32 and 40,941.02

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Solution

The fourth proportional to 72,772.80, 100,419.32 and 40,941.02 is: 56,494.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,772.80 : 100,419.32 = 40,941.02 : x
  2. Step 2: Convert to fraction form
    72,772.80/100,419.32 = 40,941.02/x
  3. Step 3: Cross multiply
    72,772.80x = 100,419.32 × 40,941.02
  4. Step 4: Simplify right side
    72,772.80x = 4,111,268,681.70
  5. Step 5: Solve for x
    x = 4,111,268,681.70/72,772.80
  6. Step 6: Final answer
    x = 56,494.58

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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.