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Finding the Fourth Proportional to 118,710.66, 163,814.48 and 64,985.40

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Solution

The fourth proportional to 118,710.66, 163,814.48 and 64,985.40 is: 89,676.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,710.66 : 163,814.48 = 64,985.40 : x
  2. Step 2: Convert to fraction form
    118,710.66/163,814.48 = 64,985.40/x
  3. Step 3: Cross multiply
    118,710.66x = 163,814.48 × 64,985.40
  4. Step 4: Simplify right side
    118,710.66x = 10,645,549,508.59
  5. Step 5: Solve for x
    x = 10,645,549,508.59/118,710.66
  6. Step 6: Final answer
    x = 89,676.44

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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.