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Finding the Fourth Proportional to 258,501.68, 387,752.60 and 81,008.68

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Solution

The fourth proportional to 258,501.68, 387,752.60 and 81,008.68 is: 121,513.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,501.68 : 387,752.60 = 81,008.68 : x
  2. Step 2: Convert to fraction form
    258,501.68/387,752.60 = 81,008.68/x
  3. Step 3: Cross multiply
    258,501.68x = 387,752.60 × 81,008.68
  4. Step 4: Simplify right side
    258,501.68x = 31,411,326,292.57
  5. Step 5: Solve for x
    x = 31,411,326,292.57/258,501.68
  6. Step 6: Final answer
    x = 121,513.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.