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Finding the Fourth Proportional to 72,638.17, 100,250.07 and 40,807.07

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Solution

The fourth proportional to 72,638.17, 100,250.07 and 40,807.07 is: 56,319.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,638.17 : 100,250.07 = 40,807.07 : x
  2. Step 2: Convert to fraction form
    72,638.17/100,250.07 = 40,807.07/x
  3. Step 3: Cross multiply
    72,638.17x = 100,250.07 × 40,807.07
  4. Step 4: Simplify right side
    72,638.17x = 4,090,911,623.99
  5. Step 5: Solve for x
    x = 4,090,911,623.99/72,638.17
  6. Step 6: Final answer
    x = 56,319.03

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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.