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Finding the Fourth Proportional to 72,662.40, 100,276.65 and 40,830.66

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Solution

The fourth proportional to 72,662.40, 100,276.65 and 40,830.66 is: 56,347.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,662.40 : 100,276.65 = 40,830.66 : x
  2. Step 2: Convert to fraction form
    72,662.40/100,276.65 = 40,830.66/x
  3. Step 3: Cross multiply
    72,662.40x = 100,276.65 × 40,830.66
  4. Step 4: Simplify right side
    72,662.40x = 4,094,361,802.09
  5. Step 5: Solve for x
    x = 4,094,361,802.09/72,662.40
  6. Step 6: Final answer
    x = 56,347.74

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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.