Home / 145,799.40-218,261.70-86,604.60

Finding the Fourth Proportional to 145,799.40, 218,261.70 and 86,604.60

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Solution

The fourth proportional to 145,799.40, 218,261.70 and 86,604.60 is: 129,647.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,799.40 : 218,261.70 = 86,604.60 : x
  2. Step 2: Convert to fraction form
    145,799.40/218,261.70 = 86,604.60/x
  3. Step 3: Cross multiply
    145,799.40x = 218,261.70 × 86,604.60
  4. Step 4: Simplify right side
    145,799.40x = 18,902,467,223.82
  5. Step 5: Solve for x
    x = 18,902,467,223.82/145,799.40
  6. Step 6: Final answer
    x = 129,647.09

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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.