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Finding the Fourth Proportional to 74,905.70, 112,358.55 and 45,308.30

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Solution

The fourth proportional to 74,905.70, 112,358.55 and 45,308.30 is: 67,962.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,905.70 : 112,358.55 = 45,308.30 : x
  2. Step 2: Convert to fraction form
    74,905.70/112,358.55 = 45,308.30/x
  3. Step 3: Cross multiply
    74,905.70x = 112,358.55 × 45,308.30
  4. Step 4: Simplify right side
    74,905.70x = 5,090,774,890.97
  5. Step 5: Solve for x
    x = 5,090,774,890.97/74,905.70
  6. Step 6: Final answer
    x = 67,962.45

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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.