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Finding the Fourth Proportional to 125,173, 187,072.28 and 91,509.89

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Solution

The fourth proportional to 125,173, 187,072.28 and 91,509.89 is: 136,762.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,173 : 187,072.28 = 91,509.89 : x
  2. Step 2: Convert to fraction form
    125,173/187,072.28 = 91,509.89/x
  3. Step 3: Cross multiply
    125,173x = 187,072.28 × 91,509.89
  4. Step 4: Simplify right side
    125,173x = 17,118,962,829.49
  5. Step 5: Solve for x
    x = 17,118,962,829.49/125,173
  6. Step 6: Final answer
    x = 136,762.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.