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Finding the Fourth Proportional to 72,773.55, 100,420.35 and 40,941.78

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Solution

The fourth proportional to 72,773.55, 100,420.35 and 40,941.78 is: 56,495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,773.55 : 100,420.35 = 40,941.78 : x
  2. Step 2: Convert to fraction form
    72,773.55/100,420.35 = 40,941.78/x
  3. Step 3: Cross multiply
    72,773.55x = 100,420.35 × 40,941.78
  4. Step 4: Simplify right side
    72,773.55x = 4,111,387,877.22
  5. Step 5: Solve for x
    x = 4,111,387,877.22/72,773.55
  6. Step 6: Final answer
    x = 56,495.63

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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.