Home / 145,387.80-218,117.70-66,485.40

Finding the Fourth Proportional to 145,387.80, 218,117.70 and 66,485.40

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Solution

The fourth proportional to 145,387.80, 218,117.70 and 66,485.40 is: 99,744.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,387.80 : 218,117.70 = 66,485.40 : x
  2. Step 2: Convert to fraction form
    145,387.80/218,117.70 = 66,485.40/x
  3. Step 3: Cross multiply
    145,387.80x = 218,117.70 × 66,485.40
  4. Step 4: Simplify right side
    145,387.80x = 14,501,642,531.58
  5. Step 5: Solve for x
    x = 14,501,642,531.58/145,387.80
  6. Step 6: Final answer
    x = 99,744.56

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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.