Home / 77,280,006.40-115,920,009.60-71,440,748.80

Finding the Fourth Proportional to 77,280,006.40, 115,920,009.60 and 71,440,748.80

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Solution

The fourth proportional to 77,280,006.40, 115,920,009.60 and 71,440,748.80 is: 107,161,123.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,280,006.40 : 115,920,009.60 = 71,440,748.80 : x
  2. Step 2: Convert to fraction form
    77,280,006.40/115,920,009.60 = 71,440,748.80/x
  3. Step 3: Cross multiply
    77,280,006.40x = 115,920,009.60 × 71,440,748.80
  4. Step 4: Simplify right side
    77,280,006.40x = 8,281,412,286,727,188
  5. Step 5: Solve for x
    x = 8,281,412,286,727,188/77,280,006.40
  6. Step 6: Final answer
    x = 107,161,123.20

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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.