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Finding the Fourth Proportional to 118,554.55, 163,602.98 and 64,839.40

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Solution

The fourth proportional to 118,554.55, 163,602.98 and 64,839.40 is: 89,477.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,554.55 : 163,602.98 = 64,839.40 : x
  2. Step 2: Convert to fraction form
    118,554.55/163,602.98 = 64,839.40/x
  3. Step 3: Cross multiply
    118,554.55x = 163,602.98 × 64,839.40
  4. Step 4: Simplify right side
    118,554.55x = 10,607,919,061.41
  5. Step 5: Solve for x
    x = 10,607,919,061.41/118,554.55
  6. Step 6: Final answer
    x = 89,477.11

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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.