Home / 138,154,626.50-190,670,103.18-78,630,395.84

Finding the Fourth Proportional to 138,154,626.50, 190,670,103.18 and 78,630,395.84

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Solution

The fourth proportional to 138,154,626.50, 190,670,103.18 and 78,630,395.84 is: 108,519,461.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,626.50 : 190,670,103.18 = 78,630,395.84 : x
  2. Step 2: Convert to fraction form
    138,154,626.50/190,670,103.18 = 78,630,395.84/x
  3. Step 3: Cross multiply
    138,154,626.50x = 190,670,103.18 × 78,630,395.84
  4. Step 4: Simplify right side
    138,154,626.50x = 14,992,465,687,897,044
  5. Step 5: Solve for x
    x = 14,992,465,687,897,044/138,154,626.50
  6. Step 6: Final answer
    x = 108,519,461.62

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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.