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Finding the Fourth Proportional to 72,718,309.60, 109,077,464.40 and 45,508,530.40

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Solution

The fourth proportional to 72,718,309.60, 109,077,464.40 and 45,508,530.40 is: 68,262,795.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,718,309.60 : 109,077,464.40 = 45,508,530.40 : x
  2. Step 2: Convert to fraction form
    72,718,309.60/109,077,464.40 = 45,508,530.40/x
  3. Step 3: Cross multiply
    72,718,309.60x = 109,077,464.40 × 45,508,530.40
  4. Step 4: Simplify right side
    72,718,309.60x = 4,963,955,104,602,318
  5. Step 5: Solve for x
    x = 4,963,955,104,602,318/72,718,309.60
  6. Step 6: Final answer
    x = 68,262,795.60

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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.