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Finding the Fourth Proportional to 121,783.12, 168,068.58 and 68,070.40

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Solution

The fourth proportional to 121,783.12, 168,068.58 and 68,070.40 is: 93,941.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,783.12 : 168,068.58 = 68,070.40 : x
  2. Step 2: Convert to fraction form
    121,783.12/168,068.58 = 68,070.40/x
  3. Step 3: Cross multiply
    121,783.12x = 168,068.58 × 68,070.40
  4. Step 4: Simplify right side
    121,783.12x = 11,440,495,468.03
  5. Step 5: Solve for x
    x = 11,440,495,468.03/121,783.12
  6. Step 6: Final answer
    x = 93,941.55

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.