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Finding the Fourth Proportional to 28,119,978.80, 42,179,968.20 and 8,952,673.40

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Solution

The fourth proportional to 28,119,978.80, 42,179,968.20 and 8,952,673.40 is: 13,429,010.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119,978.80 : 42,179,968.20 = 8,952,673.40 : x
  2. Step 2: Convert to fraction form
    28,119,978.80/42,179,968.20 = 8,952,673.40/x
  3. Step 3: Cross multiply
    28,119,978.80x = 42,179,968.20 × 8,952,673.40
  4. Step 4: Simplify right side
    28,119,978.80x = 377,623,479,316,985.94
  5. Step 5: Solve for x
    x = 377,623,479,316,985.94/28,119,978.80
  6. Step 6: Final answer
    x = 13,429,010.10

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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.