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Finding the Fourth Proportional to 125,256.51, 187,826.45 and 72,681.03

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Solution

The fourth proportional to 125,256.51, 187,826.45 and 72,681.03 is: 108,987.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,256.51 : 187,826.45 = 72,681.03 : x
  2. Step 2: Convert to fraction form
    125,256.51/187,826.45 = 72,681.03/x
  3. Step 3: Cross multiply
    125,256.51x = 187,826.45 × 72,681.03
  4. Step 4: Simplify right side
    125,256.51x = 13,651,419,483.84
  5. Step 5: Solve for x
    x = 13,651,419,483.84/125,256.51
  6. Step 6: Final answer
    x = 108,987.70

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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.