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Finding the Fourth Proportional to 72,744.98, 100,393.91 and 40,911.98

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Solution

The fourth proportional to 72,744.98, 100,393.91 and 40,911.98 is: 56,461.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,744.98 : 100,393.91 = 40,911.98 : x
  2. Step 2: Convert to fraction form
    72,744.98/100,393.91 = 40,911.98/x
  3. Step 3: Cross multiply
    72,744.98x = 100,393.91 × 40,911.98
  4. Step 4: Simplify right side
    72,744.98x = 4,107,312,931.51
  5. Step 5: Solve for x
    x = 4,107,312,931.51/72,744.98
  6. Step 6: Final answer
    x = 56,461.81

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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.