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Finding the Fourth Proportional to 158,587, 218,829.94 and 86,948.17

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Solution

The fourth proportional to 158,587, 218,829.94 and 86,948.17 is: 119,977.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,587 : 218,829.94 = 86,948.17 : x
  2. Step 2: Convert to fraction form
    158,587/218,829.94 = 86,948.17/x
  3. Step 3: Cross multiply
    158,587x = 218,829.94 × 86,948.17
  4. Step 4: Simplify right side
    158,587x = 19,026,862,824.21
  5. Step 5: Solve for x
    x = 19,026,862,824.21/158,587
  6. Step 6: Final answer
    x = 119,977.44

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1.5x scale

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.