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Finding the Fourth Proportional to 72,700.50, 100,328.31 and 44,421.78

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Solution

The fourth proportional to 72,700.50, 100,328.31 and 44,421.78 is: 61,303.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,700.50 : 100,328.31 = 44,421.78 : x
  2. Step 2: Convert to fraction form
    72,700.50/100,328.31 = 44,421.78/x
  3. Step 3: Cross multiply
    72,700.50x = 100,328.31 × 44,421.78
  4. Step 4: Simplify right side
    72,700.50x = 4,456,762,114.59
  5. Step 5: Solve for x
    x = 4,456,762,114.59/72,700.50
  6. Step 6: Final answer
    x = 61,303.05

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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.