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Finding the Fourth Proportional to 261,479.61, 392,429.63 and 135,156.91

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Solution

The fourth proportional to 261,479.61, 392,429.63 and 135,156.91 is: 202,844.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,479.61 : 392,429.63 = 135,156.91 : x
  2. Step 2: Convert to fraction form
    261,479.61/392,429.63 = 135,156.91/x
  3. Step 3: Cross multiply
    261,479.61x = 392,429.63 × 135,156.91
  4. Step 4: Simplify right side
    261,479.61x = 53,039,574,526.38
  5. Step 5: Solve for x
    x = 53,039,574,526.38/261,479.61
  6. Step 6: Final answer
    x = 202,844.02

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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.