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Finding the Fourth Proportional to 78,874.71, 118,312.37 and 19,710.44

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Solution

The fourth proportional to 78,874.71, 118,312.37 and 19,710.44 is: 29,565.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,874.71 : 118,312.37 = 19,710.44 : x
  2. Step 2: Convert to fraction form
    78,874.71/118,312.37 = 19,710.44/x
  3. Step 3: Cross multiply
    78,874.71x = 118,312.37 × 19,710.44
  4. Step 4: Simplify right side
    78,874.71x = 2,331,988,771.59
  5. Step 5: Solve for x
    x = 2,331,988,771.59/78,874.71
  6. Step 6: Final answer
    x = 29,565.74

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1.5x scale

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.