Home / 128,085.21-191,996.55-53,248.77

Finding the Fourth Proportional to 128,085.21, 191,996.55 and 53,248.77

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Solution

The fourth proportional to 128,085.21, 191,996.55 and 53,248.77 is: 79,818.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,085.21 : 191,996.55 = 53,248.77 : x
  2. Step 2: Convert to fraction form
    128,085.21/191,996.55 = 53,248.77/x
  3. Step 3: Cross multiply
    128,085.21x = 191,996.55 × 53,248.77
  4. Step 4: Simplify right side
    128,085.21x = 10,223,580,131.74
  5. Step 5: Solve for x
    x = 10,223,580,131.74/128,085.21
  6. Step 6: Final answer
    x = 79,818.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.