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Finding the Fourth Proportional to 123,875.70, 171,019.40 and 81,557.26

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Solution

The fourth proportional to 123,875.70, 171,019.40 and 81,557.26 is: 112,595.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,875.70 : 171,019.40 = 81,557.26 : x
  2. Step 2: Convert to fraction form
    123,875.70/171,019.40 = 81,557.26/x
  3. Step 3: Cross multiply
    123,875.70x = 171,019.40 × 81,557.26
  4. Step 4: Simplify right side
    123,875.70x = 13,947,873,670.84
  5. Step 5: Solve for x
    x = 13,947,873,670.84/123,875.70
  6. Step 6: Final answer
    x = 112,595.72

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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.