Home / 76,960,541.20-115,440,811.80-70,018,128.40

Finding the Fourth Proportional to 76,960,541.20, 115,440,811.80 and 70,018,128.40

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Solution

The fourth proportional to 76,960,541.20, 115,440,811.80 and 70,018,128.40 is: 105,027,192.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,960,541.20 : 115,440,811.80 = 70,018,128.40 : x
  2. Step 2: Convert to fraction form
    76,960,541.20/115,440,811.80 = 70,018,128.40/x
  3. Step 3: Cross multiply
    76,960,541.20x = 115,440,811.80 × 70,018,128.40
  4. Step 4: Simplify right side
    76,960,541.20x = 8,082,949,583,212,636
  5. Step 5: Solve for x
    x = 8,082,949,583,212,636/76,960,541.20
  6. Step 6: Final answer
    x = 105,027,192.60

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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.