Home / 78,988.05-118,502.84-28,392.21

Finding the Fourth Proportional to 78,988.05, 118,502.84 and 28,392.21

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Solution

The fourth proportional to 78,988.05, 118,502.84 and 28,392.21 is: 42,595.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,988.05 : 118,502.84 = 28,392.21 : x
  2. Step 2: Convert to fraction form
    78,988.05/118,502.84 = 28,392.21/x
  3. Step 3: Cross multiply
    78,988.05x = 118,502.84 × 28,392.21
  4. Step 4: Simplify right side
    78,988.05x = 3,364,557,673.17
  5. Step 5: Solve for x
    x = 3,364,557,673.17/78,988.05
  6. Step 6: Final answer
    x = 42,595.78

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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.