Home / 415,712,643.20-623,568,964.80-128,527,337.60

Finding the Fourth Proportional to 415,712,643.20, 623,568,964.80 and 128,527,337.60

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Solution

The fourth proportional to 415,712,643.20, 623,568,964.80 and 128,527,337.60 is: 192,791,006.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,712,643.20 : 623,568,964.80 = 128,527,337.60 : x
  2. Step 2: Convert to fraction form
    415,712,643.20/623,568,964.80 = 128,527,337.60/x
  3. Step 3: Cross multiply
    415,712,643.20x = 623,568,964.80 × 128,527,337.60
  4. Step 4: Simplify right side
    415,712,643.20x = 80,145,658,855,732,112
  5. Step 5: Solve for x
    x = 80,145,658,855,732,112/415,712,643.20
  6. Step 6: Final answer
    x = 192,791,006.40

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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.