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Finding the Fourth Proportional to 139,547.80, 209,256.90 and 60,621.40

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Solution

The fourth proportional to 139,547.80, 209,256.90 and 60,621.40 is: 90,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,547.80 : 209,256.90 = 60,621.40 : x
  2. Step 2: Convert to fraction form
    139,547.80/209,256.90 = 60,621.40/x
  3. Step 3: Cross multiply
    139,547.80x = 209,256.90 × 60,621.40
  4. Step 4: Simplify right side
    139,547.80x = 12,685,446,237.66
  5. Step 5: Solve for x
    x = 12,685,446,237.66/139,547.80
  6. Step 6: Final answer
    x = 90,903.95

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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.