Home / 72,021.41-99,389.40-40,188.41

Finding the Fourth Proportional to 72,021.41, 99,389.40 and 40,188.41

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Solution

The fourth proportional to 72,021.41, 99,389.40 and 40,188.41 is: 55,459.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,021.41 : 99,389.40 = 40,188.41 : x
  2. Step 2: Convert to fraction form
    72,021.41/99,389.40 = 40,188.41/x
  3. Step 3: Cross multiply
    72,021.41x = 99,389.40 × 40,188.41
  4. Step 4: Simplify right side
    72,021.41x = 3,994,301,956.85
  5. Step 5: Solve for x
    x = 3,994,301,956.85/72,021.41
  6. Step 6: Final answer
    x = 55,459.92

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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.