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Finding the Fourth Proportional to 72,955.32, 100,678.22 and 39,421.24

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Solution

The fourth proportional to 72,955.32, 100,678.22 and 39,421.24 is: 54,401.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,955.32 : 100,678.22 = 39,421.24 : x
  2. Step 2: Convert to fraction form
    72,955.32/100,678.22 = 39,421.24/x
  3. Step 3: Cross multiply
    72,955.32x = 100,678.22 × 39,421.24
  4. Step 4: Simplify right side
    72,955.32x = 3,968,860,273.39
  5. Step 5: Solve for x
    x = 3,968,860,273.39/72,955.32
  6. Step 6: Final answer
    x = 54,401.25

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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.