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Finding the Fourth Proportional to 64,788,668.81, 89,408,678.95 and 35,420,002.79

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Solution

The fourth proportional to 64,788,668.81, 89,408,678.95 and 35,420,002.79 is: 48,879,776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,788,668.81 : 89,408,678.95 = 35,420,002.79 : x
  2. Step 2: Convert to fraction form
    64,788,668.81/89,408,678.95 = 35,420,002.79/x
  3. Step 3: Cross multiply
    64,788,668.81x = 89,408,678.95 × 35,420,002.79
  4. Step 4: Simplify right side
    64,788,668.81x = 3,166,855,657,456,445.50
  5. Step 5: Solve for x
    x = 3,166,855,657,456,445.50/64,788,668.81
  6. Step 6: Final answer
    x = 48,879,776.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.