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Finding the Fourth Proportional to 70,298.78, 105,487.17 and 28,774.94

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Solution

The fourth proportional to 70,298.78, 105,487.17 and 28,774.94 is: 43,178.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,298.78 : 105,487.17 = 28,774.94 : x
  2. Step 2: Convert to fraction form
    70,298.78/105,487.17 = 28,774.94/x
  3. Step 3: Cross multiply
    70,298.78x = 105,487.17 × 28,774.94
  4. Step 4: Simplify right side
    70,298.78x = 3,035,386,987.52
  5. Step 5: Solve for x
    x = 3,035,386,987.52/70,298.78
  6. Step 6: Final answer
    x = 43,178.37

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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.