Home / 78,685.52-118,028.28-29,426

Finding the Fourth Proportional to 78,685.52, 118,028.28 and 29,426

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Solution

The fourth proportional to 78,685.52, 118,028.28 and 29,426 is: 44,139.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,685.52 : 118,028.28 = 29,426 : x
  2. Step 2: Convert to fraction form
    78,685.52/118,028.28 = 29,426/x
  3. Step 3: Cross multiply
    78,685.52x = 118,028.28 × 29,426
  4. Step 4: Simplify right side
    78,685.52x = 3,473,100,167.28
  5. Step 5: Solve for x
    x = 3,473,100,167.28/78,685.52
  6. Step 6: Final answer
    x = 44,139.00

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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.