Home / 7,178,975.90-9,907,017.72-3,915,860.78

Finding the Fourth Proportional to 7,178,975.90, 9,907,017.72 and 3,915,860.78

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Solution

The fourth proportional to 7,178,975.90, 9,907,017.72 and 3,915,860.78 is: 5,403,904.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,178,975.90 : 9,907,017.72 = 3,915,860.78 : x
  2. Step 2: Convert to fraction form
    7,178,975.90/9,907,017.72 = 3,915,860.78/x
  3. Step 3: Cross multiply
    7,178,975.90x = 9,907,017.72 × 3,915,860.78
  4. Step 4: Simplify right side
    7,178,975.90x = 38,794,502,136,513.02
  5. Step 5: Solve for x
    x = 38,794,502,136,513.02/7,178,975.90
  6. Step 6: Final answer
    x = 5,403,904.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.