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Finding the Fourth Proportional to 140,545.40, 210,818.10 and 70,561.40

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Solution

The fourth proportional to 140,545.40, 210,818.10 and 70,561.40 is: 105,842.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,545.40 : 210,818.10 = 70,561.40 : x
  2. Step 2: Convert to fraction form
    140,545.40/210,818.10 = 70,561.40/x
  3. Step 3: Cross multiply
    140,545.40x = 210,818.10 × 70,561.40
  4. Step 4: Simplify right side
    140,545.40x = 14,875,620,281.34
  5. Step 5: Solve for x
    x = 14,875,620,281.34/140,545.40
  6. Step 6: Final answer
    x = 105,842.10

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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.