Home / 99,849,619.20-149,774,428.80-81,709,766.40

Finding the Fourth Proportional to 99,849,619.20, 149,774,428.80 and 81,709,766.40

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Solution

The fourth proportional to 99,849,619.20, 149,774,428.80 and 81,709,766.40 is: 122,564,649.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,849,619.20 : 149,774,428.80 = 81,709,766.40 : x
  2. Step 2: Convert to fraction form
    99,849,619.20/149,774,428.80 = 81,709,766.40/x
  3. Step 3: Cross multiply
    99,849,619.20x = 149,774,428.80 × 81,709,766.40
  4. Step 4: Simplify right side
    99,849,619.20x = 12,238,033,589,941,434
  5. Step 5: Solve for x
    x = 12,238,033,589,941,434/99,849,619.20
  6. Step 6: Final answer
    x = 122,564,649.60

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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.