Home / 430,526,794.69-645,892,830.55-139,394,005.12

Finding the Fourth Proportional to 430,526,794.69, 645,892,830.55 and 139,394,005.12

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Solution

The fourth proportional to 430,526,794.69, 645,892,830.55 and 139,394,005.12 is: 209,124,239.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,526,794.69 : 645,892,830.55 = 139,394,005.12 : x
  2. Step 2: Convert to fraction form
    430,526,794.69/645,892,830.55 = 139,394,005.12/x
  3. Step 3: Cross multiply
    430,526,794.69x = 645,892,830.55 × 139,394,005.12
  4. Step 4: Simplify right side
    430,526,794.69x = 90,033,588,525,428,528
  5. Step 5: Solve for x
    x = 90,033,588,525,428,528/430,526,794.69
  6. Step 6: Final answer
    x = 209,124,239.51

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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.