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Finding the Fourth Proportional to 70,408,596.20, 105,612,894.30 and 53,402,484.20

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Solution

The fourth proportional to 70,408,596.20, 105,612,894.30 and 53,402,484.20 is: 80,103,726.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,408,596.20 : 105,612,894.30 = 53,402,484.20 : x
  2. Step 2: Convert to fraction form
    70,408,596.20/105,612,894.30 = 53,402,484.20/x
  3. Step 3: Cross multiply
    70,408,596.20x = 105,612,894.30 × 53,402,484.20
  4. Step 4: Simplify right side
    70,408,596.20x = 5,639,990,919,172,020
  5. Step 5: Solve for x
    x = 5,639,990,919,172,020/70,408,596.20
  6. Step 6: Final answer
    x = 80,103,726.30

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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.