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Finding the Fourth Proportional to 121,802.40, 182,703.60 and 69,314.40

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Solution

The fourth proportional to 121,802.40, 182,703.60 and 69,314.40 is: 103,971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,802.40 : 182,703.60 = 69,314.40 : x
  2. Step 2: Convert to fraction form
    121,802.40/182,703.60 = 69,314.40/x
  3. Step 3: Cross multiply
    121,802.40x = 182,703.60 × 69,314.40
  4. Step 4: Simplify right side
    121,802.40x = 12,663,990,411.84
  5. Step 5: Solve for x
    x = 12,663,990,411.84/121,802.40
  6. Step 6: Final answer
    x = 103,971.60

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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.