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Finding the Fourth Proportional to 74,322.57, 102,564.63 and 40,330.20

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Solution

The fourth proportional to 74,322.57, 102,564.63 and 40,330.20 is: 55,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,322.57 : 102,564.63 = 40,330.20 : x
  2. Step 2: Convert to fraction form
    74,322.57/102,564.63 = 40,330.20/x
  3. Step 3: Cross multiply
    74,322.57x = 102,564.63 × 40,330.20
  4. Step 4: Simplify right side
    74,322.57x = 4,136,452,040.83
  5. Step 5: Solve for x
    x = 4,136,452,040.83/74,322.57
  6. Step 6: Final answer
    x = 55,655.40

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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.