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Finding the Fourth Proportional to 185,702.64, 256,275.52 and 105,128.70

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Solution

The fourth proportional to 185,702.64, 256,275.52 and 105,128.70 is: 145,080.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    185,702.64 : 256,275.52 = 105,128.70 : x
  2. Step 2: Convert to fraction form
    185,702.64/256,275.52 = 105,128.70/x
  3. Step 3: Cross multiply
    185,702.64x = 256,275.52 × 105,128.70
  4. Step 4: Simplify right side
    185,702.64x = 26,941,912,259.42
  5. Step 5: Solve for x
    x = 26,941,912,259.42/185,702.64
  6. Step 6: Final answer
    x = 145,080.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.