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Finding the Fourth Proportional to 28,511,978.40, 42,767,967.60 and 9,343,360.80

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Solution

The fourth proportional to 28,511,978.40, 42,767,967.60 and 9,343,360.80 is: 14,015,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511,978.40 : 42,767,967.60 = 9,343,360.80 : x
  2. Step 2: Convert to fraction form
    28,511,978.40/42,767,967.60 = 9,343,360.80/x
  3. Step 3: Cross multiply
    28,511,978.40x = 42,767,967.60 × 9,343,360.80
  4. Step 4: Simplify right side
    28,511,978.40x = 399,596,551,969,510.12
  5. Step 5: Solve for x
    x = 399,596,551,969,510.12/28,511,978.40
  6. Step 6: Final answer
    x = 14,015,041.20

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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.