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Finding the Fourth Proportional to 145,389.60, 200,458.80 and 118,432.80

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Solution

The fourth proportional to 145,389.60, 200,458.80 and 118,432.80 is: 163,291.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,389.60 : 200,458.80 = 118,432.80 : x
  2. Step 2: Convert to fraction form
    145,389.60/200,458.80 = 118,432.80/x
  3. Step 3: Cross multiply
    145,389.60x = 200,458.80 × 118,432.80
  4. Step 4: Simplify right side
    145,389.60x = 23,740,896,968.64
  5. Step 5: Solve for x
    x = 23,740,896,968.64/145,389.60
  6. Step 6: Final answer
    x = 163,291.58

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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.