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Finding the Fourth Proportional to 139,672, 209,637.60 and 64,832.32

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Solution

The fourth proportional to 139,672, 209,637.60 and 64,832.32 is: 97,308.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,672 : 209,637.60 = 64,832.32 : x
  2. Step 2: Convert to fraction form
    139,672/209,637.60 = 64,832.32/x
  3. Step 3: Cross multiply
    139,672x = 209,637.60 × 64,832.32
  4. Step 4: Simplify right side
    139,672x = 13,591,291,967.23
  5. Step 5: Solve for x
    x = 13,591,291,967.23/139,672
  6. Step 6: Final answer
    x = 97,308.64

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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.