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Finding the Fourth Proportional to 261,602.10, 392,403.15 and 103,749.30

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Solution

The fourth proportional to 261,602.10, 392,403.15 and 103,749.30 is: 155,623.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,602.10 : 392,403.15 = 103,749.30 : x
  2. Step 2: Convert to fraction form
    261,602.10/392,403.15 = 103,749.30/x
  3. Step 3: Cross multiply
    261,602.10x = 392,403.15 × 103,749.30
  4. Step 4: Simplify right side
    261,602.10x = 40,711,552,130.30
  5. Step 5: Solve for x
    x = 40,711,552,130.30/261,602.10
  6. Step 6: Final answer
    x = 155,623.95

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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.