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Finding the Fourth Proportional to 89,898.80, 134,848.20 and 56,656.40

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Solution

The fourth proportional to 89,898.80, 134,848.20 and 56,656.40 is: 84,984.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,898.80 : 134,848.20 = 56,656.40 : x
  2. Step 2: Convert to fraction form
    89,898.80/134,848.20 = 56,656.40/x
  3. Step 3: Cross multiply
    89,898.80x = 134,848.20 × 56,656.40
  4. Step 4: Simplify right side
    89,898.80x = 7,640,013,558.48
  5. Step 5: Solve for x
    x = 7,640,013,558.48/89,898.80
  6. Step 6: Final answer
    x = 84,984.60

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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.