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Finding the Fourth Proportional to 115,064.80, 158,707.63 and 76,805.06

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Solution

The fourth proportional to 115,064.80, 158,707.63 and 76,805.06 is: 105,936.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,064.80 : 158,707.63 = 76,805.06 : x
  2. Step 2: Convert to fraction form
    115,064.80/158,707.63 = 76,805.06/x
  3. Step 3: Cross multiply
    115,064.80x = 158,707.63 × 76,805.06
  4. Step 4: Simplify right side
    115,064.80x = 12,189,549,131.80
  5. Step 5: Solve for x
    x = 12,189,549,131.80/115,064.80
  6. Step 6: Final answer
    x = 105,936.38

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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.