Home / 258,650,657.28-388,037,757.76-86,128,966.08

Finding the Fourth Proportional to 258,650,657.28, 388,037,757.76 and 86,128,966.08

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Solution

The fourth proportional to 258,650,657.28, 388,037,757.76 and 86,128,966.08 is: 129,214,018.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,650,657.28 : 388,037,757.76 = 86,128,966.08 : x
  2. Step 2: Convert to fraction form
    258,650,657.28/388,037,757.76 = 86,128,966.08/x
  3. Step 3: Cross multiply
    258,650,657.28x = 388,037,757.76 × 86,128,966.08
  4. Step 4: Simplify right side
    258,650,657.28x = 33,421,290,875,870,296
  5. Step 5: Solve for x
    x = 33,421,290,875,870,296/258,650,657.28
  6. Step 6: Final answer
    x = 129,214,018.74

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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.