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Finding the Fourth Proportional to 64,512,085.60, 90,436,359.20 and 64,512,085.60

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Solution

The fourth proportional to 64,512,085.60, 90,436,359.20 and 64,512,085.60 is: 90,436,359.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,512,085.60 : 90,436,359.20 = 64,512,085.60 : x
  2. Step 2: Convert to fraction form
    64,512,085.60/90,436,359.20 = 64,512,085.60/x
  3. Step 3: Cross multiply
    64,512,085.60x = 90,436,359.20 × 64,512,085.60
  4. Step 4: Simplify right side
    64,512,085.60x = 5,834,238,146,062,748
  5. Step 5: Solve for x
    x = 5,834,238,146,062,748/64,512,085.60
  6. Step 6: Final answer
    x = 90,436,359.20

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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.