Home / 85,248,002.80-127,872,004.20-78,193,615.60

Finding the Fourth Proportional to 85,248,002.80, 127,872,004.20 and 78,193,615.60

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Solution

The fourth proportional to 85,248,002.80, 127,872,004.20 and 78,193,615.60 is: 117,290,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,248,002.80 : 127,872,004.20 = 78,193,615.60 : x
  2. Step 2: Convert to fraction form
    85,248,002.80/127,872,004.20 = 78,193,615.60/x
  3. Step 3: Cross multiply
    85,248,002.80x = 127,872,004.20 × 78,193,615.60
  4. Step 4: Simplify right side
    85,248,002.80x = 9,998,774,342,416,384
  5. Step 5: Solve for x
    x = 9,998,774,342,416,384/85,248,002.80
  6. Step 6: Final answer
    x = 117,290,423.40

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1.5x scale

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.