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Finding the Fourth Proportional to 139,968,705.60, 209,953,058.40 and 129,765,038.40

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Solution

The fourth proportional to 139,968,705.60, 209,953,058.40 and 129,765,038.40 is: 194,647,557.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,705.60 : 209,953,058.40 = 129,765,038.40 : x
  2. Step 2: Convert to fraction form
    139,968,705.60/209,953,058.40 = 129,765,038.40/x
  3. Step 3: Cross multiply
    139,968,705.60x = 209,953,058.40 × 129,765,038.40
  4. Step 4: Simplify right side
    139,968,705.60x = 27,244,566,685,473,444
  5. Step 5: Solve for x
    x = 27,244,566,685,473,444/139,968,705.60
  6. Step 6: Final answer
    x = 194,647,557.60

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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.