Home / 77,855.09-116,782.63-18,690.76

Finding the Fourth Proportional to 77,855.09, 116,782.63 and 18,690.76

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Solution

The fourth proportional to 77,855.09, 116,782.63 and 18,690.76 is: 28,036.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,855.09 : 116,782.63 = 18,690.76 : x
  2. Step 2: Convert to fraction form
    77,855.09/116,782.63 = 18,690.76/x
  3. Step 3: Cross multiply
    77,855.09x = 116,782.63 × 18,690.76
  4. Step 4: Simplify right side
    77,855.09x = 2,182,755,432.13
  5. Step 5: Solve for x
    x = 2,182,755,432.13/77,855.09
  6. Step 6: Final answer
    x = 28,036.13

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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.