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Finding the Fourth Proportional to 125,739.84, 188,492.58 and 86,315.52

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Solution

The fourth proportional to 125,739.84, 188,492.58 and 86,315.52 is: 129,392.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,739.84 : 188,492.58 = 86,315.52 : x
  2. Step 2: Convert to fraction form
    125,739.84/188,492.58 = 86,315.52/x
  3. Step 3: Cross multiply
    125,739.84x = 188,492.58 × 86,315.52
  4. Step 4: Simplify right side
    125,739.84x = 16,269,835,058.84
  5. Step 5: Solve for x
    x = 16,269,835,058.84/125,739.84
  6. Step 6: Final answer
    x = 129,392.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.