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Finding the Fourth Proportional to 205,409.60, 308,114.40 and 139,054.40

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Solution

The fourth proportional to 205,409.60, 308,114.40 and 139,054.40 is: 208,581.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,409.60 : 308,114.40 = 139,054.40 : x
  2. Step 2: Convert to fraction form
    205,409.60/308,114.40 = 139,054.40/x
  3. Step 3: Cross multiply
    205,409.60x = 308,114.40 × 139,054.40
  4. Step 4: Simplify right side
    205,409.60x = 42,844,663,023.36
  5. Step 5: Solve for x
    x = 42,844,663,023.36/205,409.60
  6. Step 6: Final answer
    x = 208,581.60

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1.5x scale

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.