Home / 90,976.86-136,490-51,561.66

Finding the Fourth Proportional to 90,976.86, 136,490 and 51,561.66

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Solution

The fourth proportional to 90,976.86, 136,490 and 51,561.66 is: 77,356.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,976.86 : 136,490 = 51,561.66 : x
  2. Step 2: Convert to fraction form
    90,976.86/136,490 = 51,561.66/x
  3. Step 3: Cross multiply
    90,976.86x = 136,490 × 51,561.66
  4. Step 4: Simplify right side
    90,976.86x = 7,037,650,973.40
  5. Step 5: Solve for x
    x = 7,037,650,973.40/90,976.86
  6. Step 6: Final answer
    x = 77,356.49

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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.