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Finding the Fourth Proportional to 139,555.60, 209,368.68 and 60,683.92

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Solution

The fourth proportional to 139,555.60, 209,368.68 and 60,683.92 is: 91,041.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,555.60 : 209,368.68 = 60,683.92 : x
  2. Step 2: Convert to fraction form
    139,555.60/209,368.68 = 60,683.92/x
  3. Step 3: Cross multiply
    139,555.60x = 209,368.68 × 60,683.92
  4. Step 4: Simplify right side
    139,555.60x = 12,705,312,227.63
  5. Step 5: Solve for x
    x = 12,705,312,227.63/139,555.60
  6. Step 6: Final answer
    x = 91,041.22

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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.