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Finding the Fourth Proportional to 124,414.80, 171,716.40 and 81,970.80

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Solution

The fourth proportional to 124,414.80, 171,716.40 and 81,970.80 is: 113,135.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,414.80 : 171,716.40 = 81,970.80 : x
  2. Step 2: Convert to fraction form
    124,414.80/171,716.40 = 81,970.80/x
  3. Step 3: Cross multiply
    124,414.80x = 171,716.40 × 81,970.80
  4. Step 4: Simplify right side
    124,414.80x = 14,075,730,681.12
  5. Step 5: Solve for x
    x = 14,075,730,681.12/124,414.80
  6. Step 6: Final answer
    x = 113,135.50

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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.