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Finding the Fourth Proportional to 70,859,276.80, 106,288,915.20 and 64,812,659.20

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Solution

The fourth proportional to 70,859,276.80, 106,288,915.20 and 64,812,659.20 is: 97,218,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,859,276.80 : 106,288,915.20 = 64,812,659.20 : x
  2. Step 2: Convert to fraction form
    70,859,276.80/106,288,915.20 = 64,812,659.20/x
  3. Step 3: Cross multiply
    70,859,276.80x = 106,288,915.20 × 64,812,659.20
  4. Step 4: Simplify right side
    70,859,276.80x = 6,888,867,237,595,300
  5. Step 5: Solve for x
    x = 6,888,867,237,595,300/70,859,276.80
  6. Step 6: Final answer
    x = 97,218,988.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.