Home / 285,668,685.82-428,499,197.88-78,406,851.52

Finding the Fourth Proportional to 285,668,685.82, 428,499,197.88 and 78,406,851.52

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Solution

The fourth proportional to 285,668,685.82, 428,499,197.88 and 78,406,851.52 is: 117,609,225.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,668,685.82 : 428,499,197.88 = 78,406,851.52 : x
  2. Step 2: Convert to fraction form
    285,668,685.82/428,499,197.88 = 78,406,851.52/x
  3. Step 3: Cross multiply
    285,668,685.82x = 428,499,197.88 × 78,406,851.52
  4. Step 4: Simplify right side
    285,668,685.82x = 33,597,272,984,616,256
  5. Step 5: Solve for x
    x = 33,597,272,984,616,256/285,668,685.82
  6. Step 6: Final answer
    x = 117,609,225.84

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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.