Home / 149,815.76-206,828.80-102,139.16

Finding the Fourth Proportional to 149,815.76, 206,828.80 and 102,139.16

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Solution

The fourth proportional to 149,815.76, 206,828.80 and 102,139.16 is: 141,008.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,815.76 : 206,828.80 = 102,139.16 : x
  2. Step 2: Convert to fraction form
    149,815.76/206,828.80 = 102,139.16/x
  3. Step 3: Cross multiply
    149,815.76x = 206,828.80 × 102,139.16
  4. Step 4: Simplify right side
    149,815.76x = 21,125,319,895.81
  5. Step 5: Solve for x
    x = 21,125,319,895.81/149,815.76
  6. Step 6: Final answer
    x = 141,008.66

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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.