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Finding the Fourth Proportional to 217,430.80, 326,000.40 and 99,041.20

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Solution

The fourth proportional to 217,430.80, 326,000.40 and 99,041.20 is: 148,495.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,430.80 : 326,000.40 = 99,041.20 : x
  2. Step 2: Convert to fraction form
    217,430.80/326,000.40 = 99,041.20/x
  3. Step 3: Cross multiply
    217,430.80x = 326,000.40 × 99,041.20
  4. Step 4: Simplify right side
    217,430.80x = 32,287,470,816.48
  5. Step 5: Solve for x
    x = 32,287,470,816.48/217,430.80
  6. Step 6: Final answer
    x = 148,495.39

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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.