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Finding the Fourth Proportional to 65,658,574.64, 90,610,541.88 and 36,290,370.80

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Solution

The fourth proportional to 65,658,574.64, 90,610,541.88 and 36,290,370.80 is: 50,081,656.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,658,574.64 : 90,610,541.88 = 36,290,370.80 : x
  2. Step 2: Convert to fraction form
    65,658,574.64/90,610,541.88 = 36,290,370.80/x
  3. Step 3: Cross multiply
    65,658,574.64x = 90,610,541.88 × 36,290,370.80
  4. Step 4: Simplify right side
    65,658,574.64x = 3,288,290,163,214,128.50
  5. Step 5: Solve for x
    x = 3,288,290,163,214,128.50/65,658,574.64
  6. Step 6: Final answer
    x = 50,081,656.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.