Home / 81,031.47-121,547.21-21,867.05

Finding the Fourth Proportional to 81,031.47, 121,547.21 and 21,867.05

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Solution

The fourth proportional to 81,031.47, 121,547.21 and 21,867.05 is: 32,800.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.47 : 121,547.21 = 21,867.05 : x
  2. Step 2: Convert to fraction form
    81,031.47/121,547.21 = 21,867.05/x
  3. Step 3: Cross multiply
    81,031.47x = 121,547.21 × 21,867.05
  4. Step 4: Simplify right side
    81,031.47x = 2,657,878,669.23
  5. Step 5: Solve for x
    x = 2,657,878,669.23/81,031.47
  6. Step 6: Final answer
    x = 32,800.57

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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.