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Finding the Fourth Proportional to 64,514,169.60, 90,439,276.80 and 64,514,169.60

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Solution

The fourth proportional to 64,514,169.60, 90,439,276.80 and 64,514,169.60 is: 90,439,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,514,169.60 : 90,439,276.80 = 64,514,169.60 : x
  2. Step 2: Convert to fraction form
    64,514,169.60/90,439,276.80 = 64,514,169.60/x
  3. Step 3: Cross multiply
    64,514,169.60x = 90,439,276.80 × 64,514,169.60
  4. Step 4: Simplify right side
    64,514,169.60x = 5,834,614,841,976,545
  5. Step 5: Solve for x
    x = 5,834,614,841,976,545/64,514,169.60
  6. Step 6: Final answer
    x = 90,439,276.80

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1.5x scale

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.