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Finding the Fourth Proportional to 125,276.16, 172,903.20 and 74,975.04

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Solution

The fourth proportional to 125,276.16, 172,903.20 and 74,975.04 is: 103,478.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,276.16 : 172,903.20 = 74,975.04 : x
  2. Step 2: Convert to fraction form
    125,276.16/172,903.20 = 74,975.04/x
  3. Step 3: Cross multiply
    125,276.16x = 172,903.20 × 74,975.04
  4. Step 4: Simplify right side
    125,276.16x = 12,963,424,336.13
  5. Step 5: Solve for x
    x = 12,963,424,336.13/125,276.16
  6. Step 6: Final answer
    x = 103,478.78

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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.