Home / 145,986.40-218,979.60-40,805.20

Finding the Fourth Proportional to 145,986.40, 218,979.60 and 40,805.20

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Solution

The fourth proportional to 145,986.40, 218,979.60 and 40,805.20 is: 61,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,986.40 : 218,979.60 = 40,805.20 : x
  2. Step 2: Convert to fraction form
    145,986.40/218,979.60 = 40,805.20/x
  3. Step 3: Cross multiply
    145,986.40x = 218,979.60 × 40,805.20
  4. Step 4: Simplify right side
    145,986.40x = 8,935,506,373.92
  5. Step 5: Solve for x
    x = 8,935,506,373.92/145,986.40
  6. Step 6: Final answer
    x = 61,207.80

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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.