Home / 115,101,207.40-172,651,811.10-78,821,501.80

Finding the Fourth Proportional to 115,101,207.40, 172,651,811.10 and 78,821,501.80

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Solution

The fourth proportional to 115,101,207.40, 172,651,811.10 and 78,821,501.80 is: 118,232,252.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,101,207.40 : 172,651,811.10 = 78,821,501.80 : x
  2. Step 2: Convert to fraction form
    115,101,207.40/172,651,811.10 = 78,821,501.80/x
  3. Step 3: Cross multiply
    115,101,207.40x = 172,651,811.10 × 78,821,501.80
  4. Step 4: Simplify right side
    115,101,207.40x = 13,608,675,039,391,908
  5. Step 5: Solve for x
    x = 13,608,675,039,391,908/115,101,207.40
  6. Step 6: Final answer
    x = 118,232,252.70

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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.