Home / 290,307,895.80-435,660,909.30-128,865,694.20

Finding the Fourth Proportional to 290,307,895.80, 435,660,909.30 and 128,865,694.20

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Solution

The fourth proportional to 290,307,895.80, 435,660,909.30 and 128,865,694.20 is: 193,386,905.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,307,895.80 : 435,660,909.30 = 128,865,694.20 : x
  2. Step 2: Convert to fraction form
    290,307,895.80/435,660,909.30 = 128,865,694.20/x
  3. Step 3: Cross multiply
    290,307,895.80x = 435,660,909.30 × 128,865,694.20
  4. Step 4: Simplify right side
    290,307,895.80x = 56,141,745,512,747,736
  5. Step 5: Solve for x
    x = 56,141,745,512,747,736/290,307,895.80
  6. Step 6: Final answer
    x = 193,386,905.16

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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.