Home / 129,792,005.60-194,688,008.40-78,731,679.20

Finding the Fourth Proportional to 129,792,005.60, 194,688,008.40 and 78,731,679.20

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Solution

The fourth proportional to 129,792,005.60, 194,688,008.40 and 78,731,679.20 is: 118,097,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,792,005.60 : 194,688,008.40 = 78,731,679.20 : x
  2. Step 2: Convert to fraction form
    129,792,005.60/194,688,008.40 = 78,731,679.20/x
  3. Step 3: Cross multiply
    129,792,005.60x = 194,688,008.40 × 78,731,679.20
  4. Step 4: Simplify right side
    129,792,005.60x = 15,328,113,821,435,706
  5. Step 5: Solve for x
    x = 15,328,113,821,435,706/129,792,005.60
  6. Step 6: Final answer
    x = 118,097,518.80

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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.