Home / 520,276,720.56-780,415,417.80-132,128,660.40

Finding the Fourth Proportional to 520,276,720.56, 780,415,417.80 and 132,128,660.40

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Solution

The fourth proportional to 520,276,720.56, 780,415,417.80 and 132,128,660.40 is: 198,193,076.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,276,720.56 : 780,415,417.80 = 132,128,660.40 : x
  2. Step 2: Convert to fraction form
    520,276,720.56/780,415,417.80 = 132,128,660.40/x
  3. Step 3: Cross multiply
    520,276,720.56x = 780,415,417.80 × 132,128,660.40
  4. Step 4: Simplify right side
    520,276,720.56x = 103,115,243,709,420,320
  5. Step 5: Solve for x
    x = 103,115,243,709,420,320/520,276,720.56
  6. Step 6: Final answer
    x = 198,193,076.17

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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.