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Finding the Fourth Proportional to 64,421.80, 96,632.70 and 40,802.20

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Solution

The fourth proportional to 64,421.80, 96,632.70 and 40,802.20 is: 61,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,421.80 : 96,632.70 = 40,802.20 : x
  2. Step 2: Convert to fraction form
    64,421.80/96,632.70 = 40,802.20/x
  3. Step 3: Cross multiply
    64,421.80x = 96,632.70 × 40,802.20
  4. Step 4: Simplify right side
    64,421.80x = 3,942,826,751.94
  5. Step 5: Solve for x
    x = 3,942,826,751.94/64,421.80
  6. Step 6: Final answer
    x = 61,203.30

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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.