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Finding the Fourth Proportional to 249,128, 343,803.92 and 135,958.08

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Solution

The fourth proportional to 249,128, 343,803.92 and 135,958.08 is: 187,626.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,128 : 343,803.92 = 135,958.08 : x
  2. Step 2: Convert to fraction form
    249,128/343,803.92 = 135,958.08/x
  3. Step 3: Cross multiply
    249,128x = 343,803.92 × 135,958.08
  4. Step 4: Simplify right side
    249,128x = 46,742,920,859.67
  5. Step 5: Solve for x
    x = 46,742,920,859.67/249,128
  6. Step 6: Final answer
    x = 187,626.12

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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.