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Finding the Fourth Proportional to 72,718.56, 108,935.28 and 37,681.20

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Solution

The fourth proportional to 72,718.56, 108,935.28 and 37,681.20 is: 56,447.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,718.56 : 108,935.28 = 37,681.20 : x
  2. Step 2: Convert to fraction form
    72,718.56/108,935.28 = 37,681.20/x
  3. Step 3: Cross multiply
    72,718.56x = 108,935.28 × 37,681.20
  4. Step 4: Simplify right side
    72,718.56x = 4,104,812,072.74
  5. Step 5: Solve for x
    x = 4,104,812,072.74/72,718.56
  6. Step 6: Final answer
    x = 56,447.93

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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.