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Finding the Fourth Proportional to 158,871.61, 219,246.64 and 87,253.18

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Solution

The fourth proportional to 158,871.61, 219,246.64 and 87,253.18 is: 120,411.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,871.61 : 219,246.64 = 87,253.18 : x
  2. Step 2: Convert to fraction form
    158,871.61/219,246.64 = 87,253.18/x
  3. Step 3: Cross multiply
    158,871.61x = 219,246.64 × 87,253.18
  4. Step 4: Simplify right side
    158,871.61x = 19,129,966,544.32
  5. Step 5: Solve for x
    x = 19,129,966,544.32/158,871.61
  6. Step 6: Final answer
    x = 120,411.49

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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.