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Finding the Fourth Proportional to 64,651,808.10, 90,739,279.50 and 64,651,808.10

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Solution

The fourth proportional to 64,651,808.10, 90,739,279.50 and 64,651,808.10 is: 90,739,279.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,651,808.10 : 90,739,279.50 = 64,651,808.10 : x
  2. Step 2: Convert to fraction form
    64,651,808.10/90,739,279.50 = 64,651,808.10/x
  3. Step 3: Cross multiply
    64,651,808.10x = 90,739,279.50 × 64,651,808.10
  4. Step 4: Simplify right side
    64,651,808.10x = 5,866,458,485,366,264
  5. Step 5: Solve for x
    x = 5,866,458,485,366,264/64,651,808.10
  6. Step 6: Final answer
    x = 90,739,279.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.