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Finding the Fourth Proportional to 70,435,277.80, 105,652,916.70 and 64,388,660.20

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Solution

The fourth proportional to 70,435,277.80, 105,652,916.70 and 64,388,660.20 is: 96,582,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,435,277.80 : 105,652,916.70 = 64,388,660.20 : x
  2. Step 2: Convert to fraction form
    70,435,277.80/105,652,916.70 = 64,388,660.20/x
  3. Step 3: Cross multiply
    70,435,277.80x = 105,652,916.70 × 64,388,660.20
  4. Step 4: Simplify right side
    70,435,277.80x = 6,802,849,752,535,206
  5. Step 5: Solve for x
    x = 6,802,849,752,535,206/70,435,277.80
  6. Step 6: Final answer
    x = 96,582,990.30

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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.