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Finding the Fourth Proportional to 64,651,805.60, 90,739,276 and 64,651,805.60

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Solution

The fourth proportional to 64,651,805.60, 90,739,276 and 64,651,805.60 is: 90,739,276

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,651,805.60 : 90,739,276 = 64,651,805.60 : x
  2. Step 2: Convert to fraction form
    64,651,805.60/90,739,276 = 64,651,805.60/x
  3. Step 3: Cross multiply
    64,651,805.60x = 90,739,276 × 64,651,805.60
  4. Step 4: Simplify right side
    64,651,805.60x = 5,866,458,032,236,746
  5. Step 5: Solve for x
    x = 5,866,458,032,236,746/64,651,805.60
  6. Step 6: Final answer
    x = 90,739,276

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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.