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Finding the Fourth Proportional to 139,629.86, 209,444.79 and 64,740.14

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Solution

The fourth proportional to 139,629.86, 209,444.79 and 64,740.14 is: 97,110.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,629.86 : 209,444.79 = 64,740.14 : x
  2. Step 2: Convert to fraction form
    139,629.86/209,444.79 = 64,740.14/x
  3. Step 3: Cross multiply
    139,629.86x = 209,444.79 × 64,740.14
  4. Step 4: Simplify right side
    139,629.86x = 13,559,484,703.17
  5. Step 5: Solve for x
    x = 13,559,484,703.17/139,629.86
  6. Step 6: Final answer
    x = 97,110.21

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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.