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Finding the Fourth Proportional to 158,417.39, 218,615.96 and 86,800.13

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Solution

The fourth proportional to 158,417.39, 218,615.96 and 86,800.13 is: 119,784.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,417.39 : 218,615.96 = 86,800.13 : x
  2. Step 2: Convert to fraction form
    158,417.39/218,615.96 = 86,800.13/x
  3. Step 3: Cross multiply
    158,417.39x = 218,615.96 × 86,800.13
  4. Step 4: Simplify right side
    158,417.39x = 18,975,893,314.07
  5. Step 5: Solve for x
    x = 18,975,893,314.07/158,417.39
  6. Step 6: Final answer
    x = 119,784.16

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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.