Home / 315,021,750.20-472,390,907.70-120,868,638.20

Finding the Fourth Proportional to 315,021,750.20, 472,390,907.70 and 120,868,638.20

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Solution

The fourth proportional to 315,021,750.20, 472,390,907.70 and 120,868,638.20 is: 181,248,582.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,021,750.20 : 472,390,907.70 = 120,868,638.20 : x
  2. Step 2: Convert to fraction form
    315,021,750.20/472,390,907.70 = 120,868,638.20/x
  3. Step 3: Cross multiply
    315,021,750.20x = 472,390,907.70 × 120,868,638.20
  4. Step 4: Simplify right side
    315,021,750.20x = 57,097,245,711,760,896
  5. Step 5: Solve for x
    x = 57,097,245,711,760,896/315,021,750.20
  6. Step 6: Final answer
    x = 181,248,582.60

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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.