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Finding the Fourth Proportional to 72,578,492.80, 108,796,880.40 and 64,925,742.40

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Solution

The fourth proportional to 72,578,492.80, 108,796,880.40 and 64,925,742.40 is: 97,325,226.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578,492.80 : 108,796,880.40 = 64,925,742.40 : x
  2. Step 2: Convert to fraction form
    72,578,492.80/108,796,880.40 = 64,925,742.40/x
  3. Step 3: Cross multiply
    72,578,492.80x = 108,796,880.40 × 64,925,742.40
  4. Step 4: Simplify right side
    72,578,492.80x = 7,063,718,230,774,009
  5. Step 5: Solve for x
    x = 7,063,718,230,774,009/72,578,492.80
  6. Step 6: Final answer
    x = 97,325,226.22

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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.