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Finding the Fourth Proportional to 139,968,671.60, 209,953,007.40 and 111,058,281.20

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Solution

The fourth proportional to 139,968,671.60, 209,953,007.40 and 111,058,281.20 is: 166,587,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,671.60 : 209,953,007.40 = 111,058,281.20 : x
  2. Step 2: Convert to fraction form
    139,968,671.60/209,953,007.40 = 111,058,281.20/x
  3. Step 3: Cross multiply
    139,968,671.60x = 209,953,007.40 × 111,058,281.20
  4. Step 4: Simplify right side
    139,968,671.60x = 23,317,020,134,614,884
  5. Step 5: Solve for x
    x = 23,317,020,134,614,884/139,968,671.60
  6. Step 6: Final answer
    x = 166,587,421.80

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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.