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Finding the Fourth Proportional to 118,288.79, 163,416.60 and 77,549.71

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Solution

The fourth proportional to 118,288.79, 163,416.60 and 77,549.71 is: 107,135.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,288.79 : 163,416.60 = 77,549.71 : x
  2. Step 2: Convert to fraction form
    118,288.79/163,416.60 = 77,549.71/x
  3. Step 3: Cross multiply
    118,288.79x = 163,416.60 × 77,549.71
  4. Step 4: Simplify right side
    118,288.79x = 12,672,909,939.19
  5. Step 5: Solve for x
    x = 12,672,909,939.19/118,288.79
  6. Step 6: Final answer
    x = 107,135.34

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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.