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Finding the Fourth Proportional to 159,322.87, 219,870.51 and 86,730.59

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Solution

The fourth proportional to 159,322.87, 219,870.51 and 86,730.59 is: 119,690.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,322.87 : 219,870.51 = 86,730.59 : x
  2. Step 2: Convert to fraction form
    159,322.87/219,870.51 = 86,730.59/x
  3. Step 3: Cross multiply
    159,322.87x = 219,870.51 × 86,730.59
  4. Step 4: Simplify right side
    159,322.87x = 19,069,499,055.90
  5. Step 5: Solve for x
    x = 19,069,499,055.90/159,322.87
  6. Step 6: Final answer
    x = 119,690.91

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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.