Home / 145,220.40-217,730.70-74,005.20

Finding the Fourth Proportional to 145,220.40, 217,730.70 and 74,005.20

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Solution

The fourth proportional to 145,220.40, 217,730.70 and 74,005.20 is: 110,956.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,220.40 : 217,730.70 = 74,005.20 : x
  2. Step 2: Convert to fraction form
    145,220.40/217,730.70 = 74,005.20/x
  3. Step 3: Cross multiply
    145,220.40x = 217,730.70 × 74,005.20
  4. Step 4: Simplify right side
    145,220.40x = 16,113,203,999.64
  5. Step 5: Solve for x
    x = 16,113,203,999.64/145,220.40
  6. Step 6: Final answer
    x = 110,956.89

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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.