Home / 129,510,063.20-194,013,152.40-78,239,784.80

Finding the Fourth Proportional to 129,510,063.20, 194,013,152.40 and 78,239,784.80

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Solution

The fourth proportional to 129,510,063.20, 194,013,152.40 and 78,239,784.80 is: 117,207,473.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,510,063.20 : 194,013,152.40 = 78,239,784.80 : x
  2. Step 2: Convert to fraction form
    129,510,063.20/194,013,152.40 = 78,239,784.80/x
  3. Step 3: Cross multiply
    129,510,063.20x = 194,013,152.40 × 78,239,784.80
  4. Step 4: Simplify right side
    129,510,063.20x = 15,179,547,292,145,604
  5. Step 5: Solve for x
    x = 15,179,547,292,145,604/129,510,063.20
  6. Step 6: Final answer
    x = 117,207,473.44

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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.