Home / 420,484,478.76-630,728,270.46-129,349,585.32

Finding the Fourth Proportional to 420,484,478.76, 630,728,270.46 and 129,349,585.32

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Solution

The fourth proportional to 420,484,478.76, 630,728,270.46 and 129,349,585.32 is: 194,024,855.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,484,478.76 : 630,728,270.46 = 129,349,585.32 : x
  2. Step 2: Convert to fraction form
    420,484,478.76/630,728,270.46 = 129,349,585.32/x
  3. Step 3: Cross multiply
    420,484,478.76x = 630,728,270.46 × 129,349,585.32
  4. Step 4: Simplify right side
    420,484,478.76x = 81,584,440,233,601,808
  5. Step 5: Solve for x
    x = 81,584,440,233,601,808/420,484,478.76
  6. Step 6: Final answer
    x = 194,024,855.51

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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.