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Finding the Fourth Proportional to 134,693.84, 185,918.28 and 78,119.12

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Solution

The fourth proportional to 134,693.84, 185,918.28 and 78,119.12 is: 107,828.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,693.84 : 185,918.28 = 78,119.12 : x
  2. Step 2: Convert to fraction form
    134,693.84/185,918.28 = 78,119.12/x
  3. Step 3: Cross multiply
    134,693.84x = 185,918.28 × 78,119.12
  4. Step 4: Simplify right side
    134,693.84x = 14,523,772,425.51
  5. Step 5: Solve for x
    x = 14,523,772,425.51/134,693.84
  6. Step 6: Final answer
    x = 107,828.04

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1.5x scale

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.