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Finding the Fourth Proportional to 216,888.16, 299,312 and 121,392.40

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Solution

The fourth proportional to 216,888.16, 299,312 and 121,392.40 is: 167,525.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,888.16 : 299,312 = 121,392.40 : x
  2. Step 2: Convert to fraction form
    216,888.16/299,312 = 121,392.40/x
  3. Step 3: Cross multiply
    216,888.16x = 299,312 × 121,392.40
  4. Step 4: Simplify right side
    216,888.16x = 36,334,202,028.80
  5. Step 5: Solve for x
    x = 36,334,202,028.80/216,888.16
  6. Step 6: Final answer
    x = 167,525.06

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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.