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Finding the Fourth Proportional to 249,120, 343,785.60 and 148,518

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Solution

The fourth proportional to 249,120, 343,785.60 and 148,518 is: 204,954.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    249,120 : 343,785.60 = 148,518 : x
  2. Step 2: Convert to fraction form
    249,120/343,785.60 = 148,518/x
  3. Step 3: Cross multiply
    249,120x = 343,785.60 × 148,518
  4. Step 4: Simplify right side
    249,120x = 51,058,349,740.80
  5. Step 5: Solve for x
    x = 51,058,349,740.80/249,120
  6. Step 6: Final answer
    x = 204,954.84

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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.