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Finding the Fourth Proportional to 64,513,121.60, 90,437,809.60 and 64,513,121.60

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Solution

The fourth proportional to 64,513,121.60, 90,437,809.60 and 64,513,121.60 is: 90,437,809.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,513,121.60 : 90,437,809.60 = 64,513,121.60 : x
  2. Step 2: Convert to fraction form
    64,513,121.60/90,437,809.60 = 64,513,121.60/x
  3. Step 3: Cross multiply
    64,513,121.60x = 90,437,809.60 × 64,513,121.60
  4. Step 4: Simplify right side
    64,513,121.60x = 5,834,425,407,962,447
  5. Step 5: Solve for x
    x = 5,834,425,407,962,447/64,513,121.60
  6. Step 6: Final answer
    x = 90,437,809.60

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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.