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Finding the Fourth Proportional to 86,274.50, 129,486.49 and 86,075.01

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Solution

The fourth proportional to 86,274.50, 129,486.49 and 86,075.01 is: 129,187.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,274.50 : 129,486.49 = 86,075.01 : x
  2. Step 2: Convert to fraction form
    86,274.50/129,486.49 = 86,075.01/x
  3. Step 3: Cross multiply
    86,274.50x = 129,486.49 × 86,075.01
  4. Step 4: Simplify right side
    86,274.50x = 11,145,550,921.61
  5. Step 5: Solve for x
    x = 11,145,550,921.61/86,274.50
  6. Step 6: Final answer
    x = 129,187.08

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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.