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Finding the Fourth Proportional to 72,578,477.70, 108,718,417.35 and 36,696,903.30

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Solution

The fourth proportional to 72,578,477.70, 108,718,417.35 and 36,696,903.30 is: 54,969,866.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,477.70 : 108,718,417.35 = 36,696,903.30 : x
  2. Step 2: Convert to fraction form
    72,578,477.70/108,718,417.35 = 36,696,903.30/x
  3. Step 3: Cross multiply
    72,578,477.70x = 108,718,417.35 × 36,696,903.30
  4. Step 4: Simplify right side
    72,578,477.70x = 3,989,629,248,421,991.50
  5. Step 5: Solve for x
    x = 3,989,629,248,421,991.50/72,578,477.70
  6. Step 6: Final answer
    x = 54,969,866.75

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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.