Home / 128,897,975.12-193,345,069.38-31,853,680.40

Finding the Fourth Proportional to 128,897,975.12, 193,345,069.38 and 31,853,680.40

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Solution

The fourth proportional to 128,897,975.12, 193,345,069.38 and 31,853,680.40 is: 47,780,052.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897,975.12 : 193,345,069.38 = 31,853,680.40 : x
  2. Step 2: Convert to fraction form
    128,897,975.12/193,345,069.38 = 31,853,680.40/x
  3. Step 3: Cross multiply
    128,897,975.12x = 193,345,069.38 × 31,853,680.40
  4. Step 4: Simplify right side
    128,897,975.12x = 6,158,752,045,979,621
  5. Step 5: Solve for x
    x = 6,158,752,045,979,621/128,897,975.12
  6. Step 6: Final answer
    x = 47,780,052.72

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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.