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Finding the Fourth Proportional to 72,772.74, 100,421.01 and 40,935.51

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Solution

The fourth proportional to 72,772.74, 100,421.01 and 40,935.51 is: 56,487.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,772.74 : 100,421.01 = 40,935.51 : x
  2. Step 2: Convert to fraction form
    72,772.74/100,421.01 = 40,935.51/x
  3. Step 3: Cross multiply
    72,772.74x = 100,421.01 × 40,935.51
  4. Step 4: Simplify right side
    72,772.74x = 4,110,785,259.07
  5. Step 5: Solve for x
    x = 4,110,785,259.07/72,772.74
  6. Step 6: Final answer
    x = 56,487.98

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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.