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Finding the Fourth Proportional to 118,402.71, 163,395.87 and 64,688.63

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Solution

The fourth proportional to 118,402.71, 163,395.87 and 64,688.63 is: 89,270.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,402.71 : 163,395.87 = 64,688.63 : x
  2. Step 2: Convert to fraction form
    118,402.71/163,395.87 = 64,688.63/x
  3. Step 3: Cross multiply
    118,402.71x = 163,395.87 × 64,688.63
  4. Step 4: Simplify right side
    118,402.71x = 10,569,854,977.96
  5. Step 5: Solve for x
    x = 10,569,854,977.96/118,402.71
  6. Step 6: Final answer
    x = 89,270.38

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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.