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Finding the Fourth Proportional to 127,931.20, 178,870.40 and 127,931.20

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Solution

The fourth proportional to 127,931.20, 178,870.40 and 127,931.20 is: 178,870.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,931.20 : 178,870.40 = 127,931.20 : x
  2. Step 2: Convert to fraction form
    127,931.20/178,870.40 = 127,931.20/x
  3. Step 3: Cross multiply
    127,931.20x = 178,870.40 × 127,931.20
  4. Step 4: Simplify right side
    127,931.20x = 22,883,104,916.48
  5. Step 5: Solve for x
    x = 22,883,104,916.48/127,931.20
  6. Step 6: Final answer
    x = 178,870.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.