Home / 258,688,851.20-388,033,276.80-129,316,428.80

Finding the Fourth Proportional to 258,688,851.20, 388,033,276.80 and 129,316,428.80

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Solution

The fourth proportional to 258,688,851.20, 388,033,276.80 and 129,316,428.80 is: 193,974,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,688,851.20 : 388,033,276.80 = 129,316,428.80 : x
  2. Step 2: Convert to fraction form
    258,688,851.20/388,033,276.80 = 129,316,428.80/x
  3. Step 3: Cross multiply
    258,688,851.20x = 388,033,276.80 × 129,316,428.80
  4. Step 4: Simplify right side
    258,688,851.20x = 50,179,077,611,337,896
  5. Step 5: Solve for x
    x = 50,179,077,611,337,896/258,688,851.20
  6. Step 6: Final answer
    x = 193,974,643.20

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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.