Home / 256,406,912.20-384,610,368.30-74,660,019.40

Finding the Fourth Proportional to 256,406,912.20, 384,610,368.30 and 74,660,019.40

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Solution

The fourth proportional to 256,406,912.20, 384,610,368.30 and 74,660,019.40 is: 111,990,029.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,406,912.20 : 384,610,368.30 = 74,660,019.40 : x
  2. Step 2: Convert to fraction form
    256,406,912.20/384,610,368.30 = 74,660,019.40/x
  3. Step 3: Cross multiply
    256,406,912.20x = 384,610,368.30 × 74,660,019.40
  4. Step 4: Simplify right side
    256,406,912.20x = 28,715,017,558,719,148
  5. Step 5: Solve for x
    x = 28,715,017,558,719,148/256,406,912.20
  6. Step 6: Final answer
    x = 111,990,029.10

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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.