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Finding the Fourth Proportional to 158,477.76, 218,699.28 and 86,860.08

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Solution

The fourth proportional to 158,477.76, 218,699.28 and 86,860.08 is: 119,866.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,477.76 : 218,699.28 = 86,860.08 : x
  2. Step 2: Convert to fraction form
    158,477.76/218,699.28 = 86,860.08/x
  3. Step 3: Cross multiply
    158,477.76x = 218,699.28 × 86,860.08
  4. Step 4: Simplify right side
    158,477.76x = 18,996,236,956.74
  5. Step 5: Solve for x
    x = 18,996,236,956.74/158,477.76
  6. Step 6: Final answer
    x = 119,866.89

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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.