Home / 287,526,121.80-431,289,182.70-115,126,661.40

Finding the Fourth Proportional to 287,526,121.80, 431,289,182.70 and 115,126,661.40

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Solution

The fourth proportional to 287,526,121.80, 431,289,182.70 and 115,126,661.40 is: 172,689,992.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,526,121.80 : 431,289,182.70 = 115,126,661.40 : x
  2. Step 2: Convert to fraction form
    287,526,121.80/431,289,182.70 = 115,126,661.40/x
  3. Step 3: Cross multiply
    287,526,121.80x = 431,289,182.70 × 115,126,661.40
  4. Step 4: Simplify right side
    287,526,121.80x = 49,652,883,702,185,640
  5. Step 5: Solve for x
    x = 49,652,883,702,185,640/287,526,121.80
  6. Step 6: Final answer
    x = 172,689,992.10

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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.