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Finding the Fourth Proportional to 127,890, 176,488.55 and 70,527.90

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Solution

The fourth proportional to 127,890, 176,488.55 and 70,527.90 is: 97,328.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,890 : 176,488.55 = 70,527.90 : x
  2. Step 2: Convert to fraction form
    127,890/176,488.55 = 70,527.90/x
  3. Step 3: Cross multiply
    127,890x = 176,488.55 × 70,527.90
  4. Step 4: Simplify right side
    127,890x = 12,447,366,805.55
  5. Step 5: Solve for x
    x = 12,447,366,805.55/127,890
  6. Step 6: Final answer
    x = 97,328.70

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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.