Home / 145,721.80-218,679.90-66,795.40

Finding the Fourth Proportional to 145,721.80, 218,679.90 and 66,795.40

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Solution

The fourth proportional to 145,721.80, 218,679.90 and 66,795.40 is: 100,237.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,721.80 : 218,679.90 = 66,795.40 : x
  2. Step 2: Convert to fraction form
    145,721.80/218,679.90 = 66,795.40/x
  3. Step 3: Cross multiply
    145,721.80x = 218,679.90 × 66,795.40
  4. Step 4: Simplify right side
    145,721.80x = 14,606,811,392.46
  5. Step 5: Solve for x
    x = 14,606,811,392.46/145,721.80
  6. Step 6: Final answer
    x = 100,237.65

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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.