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Finding the Fourth Proportional to 145,707.40, 201,081.20 and 85,283.68

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Solution

The fourth proportional to 145,707.40, 201,081.20 and 85,283.68 is: 117,694.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,707.40 : 201,081.20 = 85,283.68 : x
  2. Step 2: Convert to fraction form
    145,707.40/201,081.20 = 85,283.68/x
  3. Step 3: Cross multiply
    145,707.40x = 201,081.20 × 85,283.68
  4. Step 4: Simplify right side
    145,707.40x = 17,148,944,714.82
  5. Step 5: Solve for x
    x = 17,148,944,714.82/145,707.40
  6. Step 6: Final answer
    x = 117,694.40

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1.5x scale

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.