Home / 258,696,343.20-388,098,428.40-86,226,736.80

Finding the Fourth Proportional to 258,696,343.20, 388,098,428.40 and 86,226,736.80

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Solution

The fourth proportional to 258,696,343.20, 388,098,428.40 and 86,226,736.80 is: 129,358,075.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,696,343.20 : 388,098,428.40 = 86,226,736.80 : x
  2. Step 2: Convert to fraction form
    258,696,343.20/388,098,428.40 = 86,226,736.80/x
  3. Step 3: Cross multiply
    258,696,343.20x = 388,098,428.40 × 86,226,736.80
  4. Step 4: Simplify right side
    258,696,343.20x = 33,464,461,038,140,440
  5. Step 5: Solve for x
    x = 33,464,461,038,140,440/258,696,343.20
  6. Step 6: Final answer
    x = 129,358,075.28

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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.