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Finding the Fourth Proportional to 208,460.72, 287,774.98 and 139,668.64

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Solution

The fourth proportional to 208,460.72, 287,774.98 and 139,668.64 is: 192,809.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,460.72 : 287,774.98 = 139,668.64 : x
  2. Step 2: Convert to fraction form
    208,460.72/287,774.98 = 139,668.64/x
  3. Step 3: Cross multiply
    208,460.72x = 287,774.98 × 139,668.64
  4. Step 4: Simplify right side
    208,460.72x = 40,193,139,014.02
  5. Step 5: Solve for x
    x = 40,193,139,014.02/208,460.72
  6. Step 6: Final answer
    x = 192,809.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.