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Finding the Fourth Proportional to 158,603.49, 218,875.62 and 86,982.89

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Solution

The fourth proportional to 158,603.49, 218,875.62 and 86,982.89 is: 120,037.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,603.49 : 218,875.62 = 86,982.89 : x
  2. Step 2: Convert to fraction form
    158,603.49/218,875.62 = 86,982.89/x
  3. Step 3: Cross multiply
    158,603.49x = 218,875.62 × 86,982.89
  4. Step 4: Simplify right side
    158,603.49x = 19,038,432,883.76
  5. Step 5: Solve for x
    x = 19,038,432,883.76/158,603.49
  6. Step 6: Final answer
    x = 120,037.92

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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.