Home / 129,342,187.60-194,013,281.40-78,197,880.40

Finding the Fourth Proportional to 129,342,187.60, 194,013,281.40 and 78,197,880.40

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Solution

The fourth proportional to 129,342,187.60, 194,013,281.40 and 78,197,880.40 is: 117,296,820.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,342,187.60 : 194,013,281.40 = 78,197,880.40 : x
  2. Step 2: Convert to fraction form
    129,342,187.60/194,013,281.40 = 78,197,880.40/x
  3. Step 3: Cross multiply
    129,342,187.60x = 194,013,281.40 × 78,197,880.40
  4. Step 4: Simplify right side
    129,342,187.60x = 15,171,427,374,928,746
  5. Step 5: Solve for x
    x = 15,171,427,374,928,746/129,342,187.60
  6. Step 6: Final answer
    x = 117,296,820.60

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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.