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Finding the Fourth Proportional to 70,530,981.60, 105,796,472.40 and 47,572,730.40

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Solution

The fourth proportional to 70,530,981.60, 105,796,472.40 and 47,572,730.40 is: 71,359,095.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,530,981.60 : 105,796,472.40 = 47,572,730.40 : x
  2. Step 2: Convert to fraction form
    70,530,981.60/105,796,472.40 = 47,572,730.40/x
  3. Step 3: Cross multiply
    70,530,981.60x = 105,796,472.40 × 47,572,730.40
  4. Step 4: Simplify right side
    70,530,981.60x = 5,033,027,058,756,241
  5. Step 5: Solve for x
    x = 5,033,027,058,756,241/70,530,981.60
  6. Step 6: Final answer
    x = 71,359,095.60

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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.