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Finding the Fourth Proportional to 139,968,130.60, 209,952,195.90 and 105,200,079.40

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Solution

The fourth proportional to 139,968,130.60, 209,952,195.90 and 105,200,079.40 is: 157,800,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,130.60 : 209,952,195.90 = 105,200,079.40 : x
  2. Step 2: Convert to fraction form
    139,968,130.60/209,952,195.90 = 105,200,079.40/x
  3. Step 3: Cross multiply
    139,968,130.60x = 209,952,195.90 × 105,200,079.40
  4. Step 4: Simplify right side
    139,968,130.60x = 22,086,987,678,884,356
  5. Step 5: Solve for x
    x = 22,086,987,678,884,356/139,968,130.60
  6. Step 6: Final answer
    x = 157,800,119.10

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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.