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Finding the Fourth Proportional to 72,683.64, 100,300.80 and 40,854.28

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Solution

The fourth proportional to 72,683.64, 100,300.80 and 40,854.28 is: 56,377.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,683.64 : 100,300.80 = 40,854.28 : x
  2. Step 2: Convert to fraction form
    72,683.64/100,300.80 = 40,854.28/x
  3. Step 3: Cross multiply
    72,683.64x = 100,300.80 × 40,854.28
  4. Step 4: Simplify right side
    72,683.64x = 4,097,716,967.42
  5. Step 5: Solve for x
    x = 4,097,716,967.42/72,683.64
  6. Step 6: Final answer
    x = 56,377.43

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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.