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Finding the Fourth Proportional to 72,637.98, 109,140.21 and 69,685.66

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Solution

The fourth proportional to 72,637.98, 109,140.21 and 69,685.66 is: 104,704.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,637.98 : 109,140.21 = 69,685.66 : x
  2. Step 2: Convert to fraction form
    72,637.98/109,140.21 = 69,685.66/x
  3. Step 3: Cross multiply
    72,637.98x = 109,140.21 × 69,685.66
  4. Step 4: Simplify right side
    72,637.98x = 7,605,507,566.39
  5. Step 5: Solve for x
    x = 7,605,507,566.39/72,637.98
  6. Step 6: Final answer
    x = 104,704.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.