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Finding the Fourth Proportional to 91,291.80, 136,937.70 and 56,117.40

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Solution

The fourth proportional to 91,291.80, 136,937.70 and 56,117.40 is: 84,176.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,291.80 : 136,937.70 = 56,117.40 : x
  2. Step 2: Convert to fraction form
    91,291.80/136,937.70 = 56,117.40/x
  3. Step 3: Cross multiply
    91,291.80x = 136,937.70 × 56,117.40
  4. Step 4: Simplify right side
    91,291.80x = 7,684,587,685.98
  5. Step 5: Solve for x
    x = 7,684,587,685.98/91,291.80
  6. Step 6: Final answer
    x = 84,176.10

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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.