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Finding the Fourth Proportional to 249,690, 344,572.32 and 136,513.68

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Solution

The fourth proportional to 249,690, 344,572.32 and 136,513.68 is: 188,388.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,690 : 344,572.32 = 136,513.68 : x
  2. Step 2: Convert to fraction form
    249,690/344,572.32 = 136,513.68/x
  3. Step 3: Cross multiply
    249,690x = 344,572.32 × 136,513.68
  4. Step 4: Simplify right side
    249,690x = 47,038,835,429.34
  5. Step 5: Solve for x
    x = 47,038,835,429.34/249,690
  6. Step 6: Final answer
    x = 188,388.94

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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.