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Finding the Fourth Proportional to 118,756.76, 163,878.20 and 65,031.40

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Solution

The fourth proportional to 118,756.76, 163,878.20 and 65,031.40 is: 89,739.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,756.76 : 163,878.20 = 65,031.40 : x
  2. Step 2: Convert to fraction form
    118,756.76/163,878.20 = 65,031.40/x
  3. Step 3: Cross multiply
    118,756.76x = 163,878.20 × 65,031.40
  4. Step 4: Simplify right side
    118,756.76x = 10,657,228,775.48
  5. Step 5: Solve for x
    x = 10,657,228,775.48/118,756.76
  6. Step 6: Final answer
    x = 89,739.98

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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.