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Finding the Fourth Proportional to 155,955.66, 215,290.35 and 102,242.94

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Solution

The fourth proportional to 155,955.66, 215,290.35 and 102,242.94 is: 141,142.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,955.66 : 215,290.35 = 102,242.94 : x
  2. Step 2: Convert to fraction form
    155,955.66/215,290.35 = 102,242.94/x
  3. Step 3: Cross multiply
    155,955.66x = 215,290.35 × 102,242.94
  4. Step 4: Simplify right side
    155,955.66x = 22,011,918,337.63
  5. Step 5: Solve for x
    x = 22,011,918,337.63/155,955.66
  6. Step 6: Final answer
    x = 141,142.16

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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.