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Finding the Fourth Proportional to 47,287,978.80, 70,931,968.20 and 16,998,903.60

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Solution

The fourth proportional to 47,287,978.80, 70,931,968.20 and 16,998,903.60 is: 25,498,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,287,978.80 : 70,931,968.20 = 16,998,903.60 : x
  2. Step 2: Convert to fraction form
    47,287,978.80/70,931,968.20 = 16,998,903.60/x
  3. Step 3: Cross multiply
    47,287,978.80x = 70,931,968.20 × 16,998,903.60
  4. Step 4: Simplify right side
    47,287,978.80x = 1,205,765,689,590,065.75
  5. Step 5: Solve for x
    x = 1,205,765,689,590,065.75/47,287,978.80
  6. Step 6: Final answer
    x = 25,498,355.40

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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.