Home / 55,811.77-77,021.45-30,662.89

Finding the Fourth Proportional to 55,811.77, 77,021.45 and 30,662.89

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Solution

The fourth proportional to 55,811.77, 77,021.45 and 30,662.89 is: 42,315.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,811.77 : 77,021.45 = 30,662.89 : x
  2. Step 2: Convert to fraction form
    55,811.77/77,021.45 = 30,662.89/x
  3. Step 3: Cross multiply
    55,811.77x = 77,021.45 × 30,662.89
  4. Step 4: Simplify right side
    55,811.77x = 2,361,700,018.11
  5. Step 5: Solve for x
    x = 2,361,700,018.11/55,811.77
  6. Step 6: Final answer
    x = 42,315.45

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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.