Home / 261,931.20-392,637.60-128,702.40

Finding the Fourth Proportional to 261,931.20, 392,637.60 and 128,702.40

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Solution

The fourth proportional to 261,931.20, 392,637.60 and 128,702.40 is: 192,926.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,931.20 : 392,637.60 = 128,702.40 : x
  2. Step 2: Convert to fraction form
    261,931.20/392,637.60 = 128,702.40/x
  3. Step 3: Cross multiply
    261,931.20x = 392,637.60 × 128,702.40
  4. Step 4: Simplify right side
    261,931.20x = 50,533,401,450.24
  5. Step 5: Solve for x
    x = 50,533,401,450.24/261,931.20
  6. Step 6: Final answer
    x = 192,926.24

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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.