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Finding the Fourth Proportional to 216,695.30, 299,041.40 and 121,210.88

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Solution

The fourth proportional to 216,695.30, 299,041.40 and 121,210.88 is: 167,272.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,695.30 : 299,041.40 = 121,210.88 : x
  2. Step 2: Convert to fraction form
    216,695.30/299,041.40 = 121,210.88/x
  3. Step 3: Cross multiply
    216,695.30x = 299,041.40 × 121,210.88
  4. Step 4: Simplify right side
    216,695.30x = 36,247,070,058.25
  5. Step 5: Solve for x
    x = 36,247,070,058.25/216,695.30
  6. Step 6: Final answer
    x = 167,272.07

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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.