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Finding the Fourth Proportional to 72,954.72, 100,677.50 and 39,420.72

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Solution

The fourth proportional to 72,954.72, 100,677.50 and 39,420.72 is: 54,400.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,954.72 : 100,677.50 = 39,420.72 : x
  2. Step 2: Convert to fraction form
    72,954.72/100,677.50 = 39,420.72/x
  3. Step 3: Cross multiply
    72,954.72x = 100,677.50 × 39,420.72
  4. Step 4: Simplify right side
    72,954.72x = 3,968,779,034.41
  5. Step 5: Solve for x
    x = 3,968,779,034.41/72,954.72
  6. Step 6: Final answer
    x = 54,400.58

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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.