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Finding the Fourth Proportional to 249,169.59, 343,831.96 and 138,779.81

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Solution

The fourth proportional to 249,169.59, 343,831.96 and 138,779.81 is: 191,503.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,169.59 : 343,831.96 = 138,779.81 : x
  2. Step 2: Convert to fraction form
    249,169.59/343,831.96 = 138,779.81/x
  3. Step 3: Cross multiply
    249,169.59x = 343,831.96 × 138,779.81
  4. Step 4: Simplify right side
    249,169.59x = 47,716,933,386.83
  5. Step 5: Solve for x
    x = 47,716,933,386.83/249,169.59
  6. Step 6: Final answer
    x = 191,503.84

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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.