Home / 86,075.40-129,108.09-38,678.25

Finding the Fourth Proportional to 86,075.40, 129,108.09 and 38,678.25

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Solution

The fourth proportional to 86,075.40, 129,108.09 and 38,678.25 is: 58,015.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,075.40 : 129,108.09 = 38,678.25 : x
  2. Step 2: Convert to fraction form
    86,075.40/129,108.09 = 38,678.25/x
  3. Step 3: Cross multiply
    86,075.40x = 129,108.09 × 38,678.25
  4. Step 4: Simplify right side
    86,075.40x = 4,993,674,982.04
  5. Step 5: Solve for x
    x = 4,993,674,982.04/86,075.40
  6. Step 6: Final answer
    x = 58,015.12

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1.5x scale

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.