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Finding the Fourth Proportional to 121,210.91, 181,568.49 and 98,801.45

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Solution

The fourth proportional to 121,210.91, 181,568.49 and 98,801.45 is: 148,000.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,210.91 : 181,568.49 = 98,801.45 : x
  2. Step 2: Convert to fraction form
    121,210.91/181,568.49 = 98,801.45/x
  3. Step 3: Cross multiply
    121,210.91x = 181,568.49 × 98,801.45
  4. Step 4: Simplify right side
    121,210.91x = 17,939,229,178.47
  5. Step 5: Solve for x
    x = 17,939,229,178.47/121,210.91
  6. Step 6: Final answer
    x = 148,000.13

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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.