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Finding the Fourth Proportional to 158,710.66, 219,020.39 and 86,113.52

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Solution

The fourth proportional to 158,710.66, 219,020.39 and 86,113.52 is: 118,836.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,710.66 : 219,020.39 = 86,113.52 : x
  2. Step 2: Convert to fraction form
    158,710.66/219,020.39 = 86,113.52/x
  3. Step 3: Cross multiply
    158,710.66x = 219,020.39 × 86,113.52
  4. Step 4: Simplify right side
    158,710.66x = 18,860,617,008.45
  5. Step 5: Solve for x
    x = 18,860,617,008.45/158,710.66
  6. Step 6: Final answer
    x = 118,836.49

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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.