Home / 147,787.40-221,681.10-85,425.80

Finding the Fourth Proportional to 147,787.40, 221,681.10 and 85,425.80

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Solution

The fourth proportional to 147,787.40, 221,681.10 and 85,425.80 is: 128,138.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,787.40 : 221,681.10 = 85,425.80 : x
  2. Step 2: Convert to fraction form
    147,787.40/221,681.10 = 85,425.80/x
  3. Step 3: Cross multiply
    147,787.40x = 221,681.10 × 85,425.80
  4. Step 4: Simplify right side
    147,787.40x = 18,937,285,312.38
  5. Step 5: Solve for x
    x = 18,937,285,312.38/147,787.40
  6. Step 6: Final answer
    x = 128,138.70

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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.