Home / 120,636,006.40-180,954,009.60-86,623,782.40

Finding the Fourth Proportional to 120,636,006.40, 180,954,009.60 and 86,623,782.40

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Solution

The fourth proportional to 120,636,006.40, 180,954,009.60 and 86,623,782.40 is: 129,935,673.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,636,006.40 : 180,954,009.60 = 86,623,782.40 : x
  2. Step 2: Convert to fraction form
    120,636,006.40/180,954,009.60 = 86,623,782.40/x
  3. Step 3: Cross multiply
    120,636,006.40x = 180,954,009.60 × 86,623,782.40
  4. Step 4: Simplify right side
    120,636,006.40x = 15,674,920,751,997,912
  5. Step 5: Solve for x
    x = 15,674,920,751,997,912/120,636,006.40
  6. Step 6: Final answer
    x = 129,935,673.60

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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.