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Finding the Fourth Proportional to 128,312.01, 192,475.89 and 49,426.47

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Solution

The fourth proportional to 128,312.01, 192,475.89 and 49,426.47 is: 74,142.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,312.01 : 192,475.89 = 49,426.47 : x
  2. Step 2: Convert to fraction form
    128,312.01/192,475.89 = 49,426.47/x
  3. Step 3: Cross multiply
    128,312.01x = 192,475.89 × 49,426.47
  4. Step 4: Simplify right side
    128,312.01x = 9,513,403,802.81
  5. Step 5: Solve for x
    x = 9,513,403,802.81/128,312.01
  6. Step 6: Final answer
    x = 74,142.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.