Home / 102,690.48-141,510.97-78,518.81

Finding the Fourth Proportional to 102,690.48, 141,510.97 and 78,518.81

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Solution

The fourth proportional to 102,690.48, 141,510.97 and 78,518.81 is: 108,201.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,690.48 : 141,510.97 = 78,518.81 : x
  2. Step 2: Convert to fraction form
    102,690.48/141,510.97 = 78,518.81/x
  3. Step 3: Cross multiply
    102,690.48x = 141,510.97 × 78,518.81
  4. Step 4: Simplify right side
    102,690.48x = 11,111,272,966.35
  5. Step 5: Solve for x
    x = 11,111,272,966.35/102,690.48
  6. Step 6: Final answer
    x = 108,201.59

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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.