Home / 212,461,478.40-318,181,313.28-121,308,787.20

Finding the Fourth Proportional to 212,461,478.40, 318,181,313.28 and 121,308,787.20

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Solution

The fourth proportional to 212,461,478.40, 318,181,313.28 and 121,308,787.20 is: 181,671,470.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,461,478.40 : 318,181,313.28 = 121,308,787.20 : x
  2. Step 2: Convert to fraction form
    212,461,478.40/318,181,313.28 = 121,308,787.20/x
  3. Step 3: Cross multiply
    212,461,478.40x = 318,181,313.28 × 121,308,787.20
  4. Step 4: Simplify right side
    212,461,478.40x = 38,598,189,223,700,048
  5. Step 5: Solve for x
    x = 38,598,189,223,700,048/212,461,478.40
  6. Step 6: Final answer
    x = 181,671,470.59

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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.