Home / 78,351,459.20-117,527,188.80-65,810,326.40

Finding the Fourth Proportional to 78,351,459.20, 117,527,188.80 and 65,810,326.40

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Solution

The fourth proportional to 78,351,459.20, 117,527,188.80 and 65,810,326.40 is: 98,715,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,351,459.20 : 117,527,188.80 = 65,810,326.40 : x
  2. Step 2: Convert to fraction form
    78,351,459.20/117,527,188.80 = 65,810,326.40/x
  3. Step 3: Cross multiply
    78,351,459.20x = 117,527,188.80 × 65,810,326.40
  4. Step 4: Simplify right side
    78,351,459.20x = 7,734,502,655,802,424
  5. Step 5: Solve for x
    x = 7,734,502,655,802,424/78,351,459.20
  6. Step 6: Final answer
    x = 98,715,489.60

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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.