Home / 258,403.32-387,663.48-89,931.60

Finding the Fourth Proportional to 258,403.32, 387,663.48 and 89,931.60

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Solution

The fourth proportional to 258,403.32, 387,663.48 and 89,931.60 is: 134,917.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,403.32 : 387,663.48 = 89,931.60 : x
  2. Step 2: Convert to fraction form
    258,403.32/387,663.48 = 89,931.60/x
  3. Step 3: Cross multiply
    258,403.32x = 387,663.48 × 89,931.60
  4. Step 4: Simplify right side
    258,403.32x = 34,863,197,017.97
  5. Step 5: Solve for x
    x = 34,863,197,017.97/258,403.32
  6. Step 6: Final answer
    x = 134,917.76

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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.