Home / 81,031.92-121,547.16-28,429.08

Finding the Fourth Proportional to 81,031.92, 121,547.16 and 28,429.08

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Solution

The fourth proportional to 81,031.92, 121,547.16 and 28,429.08 is: 42,643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,031.92 : 121,547.16 = 28,429.08 : x
  2. Step 2: Convert to fraction form
    81,031.92/121,547.16 = 28,429.08/x
  3. Step 3: Cross multiply
    81,031.92x = 121,547.16 × 28,429.08
  4. Step 4: Simplify right side
    81,031.92x = 3,455,473,935.41
  5. Step 5: Solve for x
    x = 3,455,473,935.41/81,031.92
  6. Step 6: Final answer
    x = 42,643.37

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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.