Home / 86,938,277.20-130,407,415.80-80,369,112.40

Finding the Fourth Proportional to 86,938,277.20, 130,407,415.80 and 80,369,112.40

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Solution

The fourth proportional to 86,938,277.20, 130,407,415.80 and 80,369,112.40 is: 120,553,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,938,277.20 : 130,407,415.80 = 80,369,112.40 : x
  2. Step 2: Convert to fraction form
    86,938,277.20/130,407,415.80 = 80,369,112.40/x
  3. Step 3: Cross multiply
    86,938,277.20x = 130,407,415.80 × 80,369,112.40
  4. Step 4: Simplify right side
    86,938,277.20x = 10,480,728,258,223,736
  5. Step 5: Solve for x
    x = 10,480,728,258,223,736/86,938,277.20
  6. Step 6: Final answer
    x = 120,553,668.60

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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.