Home / 78,514.08-116,939.64-78,131.76

Finding the Fourth Proportional to 78,514.08, 116,939.64 and 78,131.76

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Solution

The fourth proportional to 78,514.08, 116,939.64 and 78,131.76 is: 116,370.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,514.08 : 116,939.64 = 78,131.76 : x
  2. Step 2: Convert to fraction form
    78,514.08/116,939.64 = 78,131.76/x
  3. Step 3: Cross multiply
    78,514.08x = 116,939.64 × 78,131.76
  4. Step 4: Simplify right side
    78,514.08x = 9,136,699,886.97
  5. Step 5: Solve for x
    x = 9,136,699,886.97/78,514.08
  6. Step 6: Final answer
    x = 116,370.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.