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Finding the Fourth Proportional to 216,258.93, 298,424.93 and 129,142.31

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Solution

The fourth proportional to 216,258.93, 298,424.93 and 129,142.31 is: 178,208.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,258.93 : 298,424.93 = 129,142.31 : x
  2. Step 2: Convert to fraction form
    216,258.93/298,424.93 = 129,142.31/x
  3. Step 3: Cross multiply
    216,258.93x = 298,424.93 × 129,142.31
  4. Step 4: Simplify right side
    216,258.93x = 38,539,282,683.95
  5. Step 5: Solve for x
    x = 38,539,282,683.95/216,258.93
  6. Step 6: Final answer
    x = 178,208.98

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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.