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Finding the Fourth Proportional to 70,429,510.80, 105,644,266.20 and 57,664,429.20

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Solution

The fourth proportional to 70,429,510.80, 105,644,266.20 and 57,664,429.20 is: 86,496,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,429,510.80 : 105,644,266.20 = 57,664,429.20 : x
  2. Step 2: Convert to fraction form
    70,429,510.80/105,644,266.20 = 57,664,429.20/x
  3. Step 3: Cross multiply
    70,429,510.80x = 105,644,266.20 × 57,664,429.20
  4. Step 4: Simplify right side
    70,429,510.80x = 6,091,916,308,675,854
  5. Step 5: Solve for x
    x = 6,091,916,308,675,854/70,429,510.80
  6. Step 6: Final answer
    x = 86,496,643.80

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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.