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Finding the Fourth Proportional to 121,210.71, 181,703.81 and 61,915.60

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Solution

The fourth proportional to 121,210.71, 181,703.81 and 61,915.60 is: 92,816.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,210.71 : 181,703.81 = 61,915.60 : x
  2. Step 2: Convert to fraction form
    121,210.71/181,703.81 = 61,915.60/x
  3. Step 3: Cross multiply
    121,210.71x = 181,703.81 × 61,915.60
  4. Step 4: Simplify right side
    121,210.71x = 11,250,300,108.86
  5. Step 5: Solve for x
    x = 11,250,300,108.86/121,210.71
  6. Step 6: Final answer
    x = 92,816.06

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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.