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Finding the Fourth Proportional to 72,445.80, 99,977.28 and 40,615.22

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Solution

The fourth proportional to 72,445.80, 99,977.28 and 40,615.22 is: 56,050.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,445.80 : 99,977.28 = 40,615.22 : x
  2. Step 2: Convert to fraction form
    72,445.80/99,977.28 = 40,615.22/x
  3. Step 3: Cross multiply
    72,445.80x = 99,977.28 × 40,615.22
  4. Step 4: Simplify right side
    72,445.80x = 4,060,599,222.20
  5. Step 5: Solve for x
    x = 4,060,599,222.20/72,445.80
  6. Step 6: Final answer
    x = 56,050.17

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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.