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Finding the Fourth Proportional to 172,603,328.80, 258,730,810.80 and 86,208,858.40

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Solution

The fourth proportional to 172,603,328.80, 258,730,810.80 and 86,208,858.40 is: 129,226,290.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,603,328.80 : 258,730,810.80 = 86,208,858.40 : x
  2. Step 2: Convert to fraction form
    172,603,328.80/258,730,810.80 = 86,208,858.40/x
  3. Step 3: Cross multiply
    172,603,328.80x = 258,730,810.80 × 86,208,858.40
  4. Step 4: Simplify right side
    172,603,328.80x = 22,304,887,831,974,392
  5. Step 5: Solve for x
    x = 22,304,887,831,974,392/172,603,328.80
  6. Step 6: Final answer
    x = 129,226,290.06

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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.