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Finding the Fourth Proportional to 261,475.40, 392,161.47 and 71,886.88

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Solution

The fourth proportional to 261,475.40, 392,161.47 and 71,886.88 is: 107,816.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,475.40 : 392,161.47 = 71,886.88 : x
  2. Step 2: Convert to fraction form
    261,475.40/392,161.47 = 71,886.88/x
  3. Step 3: Cross multiply
    261,475.40x = 392,161.47 × 71,886.88
  4. Step 4: Simplify right side
    261,475.40x = 28,191,264,534.51
  5. Step 5: Solve for x
    x = 28,191,264,534.51/261,475.40
  6. Step 6: Final answer
    x = 107,816.13

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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.