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Finding the Fourth Proportional to 139,968,406.40, 209,952,609.60 and 89,076,041.60

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Solution

The fourth proportional to 139,968,406.40, 209,952,609.60 and 89,076,041.60 is: 133,614,062.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,406.40 : 209,952,609.60 = 89,076,041.60 : x
  2. Step 2: Convert to fraction form
    139,968,406.40/209,952,609.60 = 89,076,041.60/x
  3. Step 3: Cross multiply
    139,968,406.40x = 209,952,609.60 × 89,076,041.60
  4. Step 4: Simplify right side
    139,968,406.40x = 18,701,747,386,758,156
  5. Step 5: Solve for x
    x = 18,701,747,386,758,156/139,968,406.40
  6. Step 6: Final answer
    x = 133,614,062.40

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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.