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Finding the Fourth Proportional to 118,424.40, 163,420.80 and 64,711.28

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Solution

The fourth proportional to 118,424.40, 163,420.80 and 64,711.28 is: 89,298.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,424.40 : 163,420.80 = 64,711.28 : x
  2. Step 2: Convert to fraction form
    118,424.40/163,420.80 = 64,711.28/x
  3. Step 3: Cross multiply
    118,424.40x = 163,420.80 × 64,711.28
  4. Step 4: Simplify right side
    118,424.40x = 10,575,169,146.62
  5. Step 5: Solve for x
    x = 10,575,169,146.62/118,424.40
  6. Step 6: Final answer
    x = 89,298.90

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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.