Home / 115,929.64-159,969.78-64,935.40

Finding the Fourth Proportional to 115,929.64, 159,969.78 and 64,935.40

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Solution

The fourth proportional to 115,929.64, 159,969.78 and 64,935.40 is: 89,603.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,929.64 : 159,969.78 = 64,935.40 : x
  2. Step 2: Convert to fraction form
    115,929.64/159,969.78 = 64,935.40/x
  3. Step 3: Cross multiply
    115,929.64x = 159,969.78 × 64,935.40
  4. Step 4: Simplify right side
    115,929.64x = 10,387,701,652.21
  5. Step 5: Solve for x
    x = 10,387,701,652.21/115,929.64
  6. Step 6: Final answer
    x = 89,603.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.