Home / 125,385.95-188,109.30-72,112.02

Finding the Fourth Proportional to 125,385.95, 188,109.30 and 72,112.02

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Solution

The fourth proportional to 125,385.95, 188,109.30 and 72,112.02 is: 108,185.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,385.95 : 188,109.30 = 72,112.02 : x
  2. Step 2: Convert to fraction form
    125,385.95/188,109.30 = 72,112.02/x
  3. Step 3: Cross multiply
    125,385.95x = 188,109.30 × 72,112.02
  4. Step 4: Simplify right side
    125,385.95x = 13,564,941,603.79
  5. Step 5: Solve for x
    x = 13,564,941,603.79/125,385.95
  6. Step 6: Final answer
    x = 108,185.50

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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.