Home / 129,155,706.42-178,238,449.00-78,928,054.98

Finding the Fourth Proportional to 129,155,706.42, 178,238,449.00 and 78,928,054.98

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Solution

The fourth proportional to 129,155,706.42, 178,238,449.00 and 78,928,054.98 is: 108,922,900.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,155,706.42 : 178,238,449.00 = 78,928,054.98 : x
  2. Step 2: Convert to fraction form
    129,155,706.42/178,238,449.00 = 78,928,054.98/x
  3. Step 3: Cross multiply
    129,155,706.42x = 178,238,449.00 × 78,928,054.98
  4. Step 4: Simplify right side
    129,155,706.42x = 14,068,014,102,875,782
  5. Step 5: Solve for x
    x = 14,068,014,102,875,782/129,155,706.42
  6. Step 6: Final answer
    x = 108,922,900.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.