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Finding the Fourth Proportional to 42,287,978.80, 63,431,968.20 and 28,851,050.80

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Solution

The fourth proportional to 42,287,978.80, 63,431,968.20 and 28,851,050.80 is: 43,276,576.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,287,978.80 : 63,431,968.20 = 28,851,050.80 : x
  2. Step 2: Convert to fraction form
    42,287,978.80/63,431,968.20 = 28,851,050.80/x
  3. Step 3: Cross multiply
    42,287,978.80x = 63,431,968.20 × 28,851,050.80
  4. Step 4: Simplify right side
    42,287,978.80x = 1,830,078,936,882,184.75
  5. Step 5: Solve for x
    x = 1,830,078,936,882,184.75/42,287,978.80
  6. Step 6: Final answer
    x = 43,276,576.20

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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.