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Finding the Fourth Proportional to 212,312.61, 292,993.61 and 121,666.59

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Solution

The fourth proportional to 212,312.61, 292,993.61 and 121,666.59 is: 167,901.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,312.61 : 292,993.61 = 121,666.59 : x
  2. Step 2: Convert to fraction form
    212,312.61/292,993.61 = 121,666.59/x
  3. Step 3: Cross multiply
    212,312.61x = 292,993.61 × 121,666.59
  4. Step 4: Simplify right side
    212,312.61x = 35,647,532,812.16
  5. Step 5: Solve for x
    x = 35,647,532,812.16/212,312.61
  6. Step 6: Final answer
    x = 167,901.16

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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.