Home / 128,670,009.40-193,033,007.70-42,393,734.20

Finding the Fourth Proportional to 128,670,009.40, 193,033,007.70 and 42,393,734.20

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Solution

The fourth proportional to 128,670,009.40, 193,033,007.70 and 42,393,734.20 is: 63,599,824.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,670,009.40 : 193,033,007.70 = 42,393,734.20 : x
  2. Step 2: Convert to fraction form
    128,670,009.40/193,033,007.70 = 42,393,734.20/x
  3. Step 3: Cross multiply
    128,670,009.40x = 193,033,007.70 × 42,393,734.20
  4. Step 4: Simplify right side
    128,670,009.40x = 8,183,390,020,260,353
  5. Step 5: Solve for x
    x = 8,183,390,020,260,353/128,670,009.40
  6. Step 6: Final answer
    x = 63,599,824.53

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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.