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Finding the Fourth Proportional to 139,968,205.80, 209,952,308.70 and 88,312,140.60

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Solution

The fourth proportional to 139,968,205.80, 209,952,308.70 and 88,312,140.60 is: 132,468,210.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,205.80 : 209,952,308.70 = 88,312,140.60 : x
  2. Step 2: Convert to fraction form
    139,968,205.80/209,952,308.70 = 88,312,140.60/x
  3. Step 3: Cross multiply
    139,968,205.80x = 209,952,308.70 × 88,312,140.60
  4. Step 4: Simplify right side
    139,968,205.80x = 18,541,337,805,209,000
  5. Step 5: Solve for x
    x = 18,541,337,805,209,000/139,968,205.80
  6. Step 6: Final answer
    x = 132,468,210.90

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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.