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Finding the Fourth Proportional to 72,802.56, 100,459.80 and 40,970.94

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Solution

The fourth proportional to 72,802.56, 100,459.80 and 40,970.94 is: 56,535.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,802.56 : 100,459.80 = 40,970.94 : x
  2. Step 2: Convert to fraction form
    72,802.56/100,459.80 = 40,970.94/x
  3. Step 3: Cross multiply
    72,802.56x = 100,459.80 × 40,970.94
  4. Step 4: Simplify right side
    72,802.56x = 4,115,932,438.21
  5. Step 5: Solve for x
    x = 4,115,932,438.21/72,802.56
  6. Step 6: Final answer
    x = 56,535.55

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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.