Home / 280,129,071.60-420,193,607.40-86,040,175.39

Finding the Fourth Proportional to 280,129,071.60, 420,193,607.40 and 86,040,175.39

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Solution

The fourth proportional to 280,129,071.60, 420,193,607.40 and 86,040,175.39 is: 129,060,263.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,129,071.60 : 420,193,607.40 = 86,040,175.39 : x
  2. Step 2: Convert to fraction form
    280,129,071.60/420,193,607.40 = 86,040,175.39/x
  3. Step 3: Cross multiply
    280,129,071.60x = 420,193,607.40 × 86,040,175.39
  4. Step 4: Simplify right side
    280,129,071.60x = 36,153,531,677,402,320
  5. Step 5: Solve for x
    x = 36,153,531,677,402,320/280,129,071.60
  6. Step 6: Final answer
    x = 129,060,263.08

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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.