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Finding the Fourth Proportional to 145,281.68, 200,477.94 and 81,630.08

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Solution

The fourth proportional to 145,281.68, 200,477.94 and 81,630.08 is: 112,643.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,281.68 : 200,477.94 = 81,630.08 : x
  2. Step 2: Convert to fraction form
    145,281.68/200,477.94 = 81,630.08/x
  3. Step 3: Cross multiply
    145,281.68x = 200,477.94 × 81,630.08
  4. Step 4: Simplify right side
    145,281.68x = 16,365,030,280.44
  5. Step 5: Solve for x
    x = 16,365,030,280.44/145,281.68
  6. Step 6: Final answer
    x = 112,643.45

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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.