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Finding the Fourth Proportional to 219,133.76, 302,413.22 and 128,477.12

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Solution

The fourth proportional to 219,133.76, 302,413.22 and 128,477.12 is: 177,303.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,133.76 : 302,413.22 = 128,477.12 : x
  2. Step 2: Convert to fraction form
    219,133.76/302,413.22 = 128,477.12/x
  3. Step 3: Cross multiply
    219,133.76x = 302,413.22 × 128,477.12
  4. Step 4: Simplify right side
    219,133.76x = 38,853,179,555.53
  5. Step 5: Solve for x
    x = 38,853,179,555.53/219,133.76
  6. Step 6: Final answer
    x = 177,303.49

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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.