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Finding the Fourth Proportional to 90,718.88, 136,164.48 and 55,726.88

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Solution

The fourth proportional to 90,718.88, 136,164.48 and 55,726.88 is: 83,643.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,718.88 : 136,164.48 = 55,726.88 : x
  2. Step 2: Convert to fraction form
    90,718.88/136,164.48 = 55,726.88/x
  3. Step 3: Cross multiply
    90,718.88x = 136,164.48 × 55,726.88
  4. Step 4: Simplify right side
    90,718.88x = 7,588,021,637.22
  5. Step 5: Solve for x
    x = 7,588,021,637.22/90,718.88
  6. Step 6: Final answer
    x = 83,643.25

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1.5x scale

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.