Home / 138,812,608.60-208,290,209.10-61,143,937.72

Finding the Fourth Proportional to 138,812,608.60, 208,290,209.10 and 61,143,937.72

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Solution

The fourth proportional to 138,812,608.60, 208,290,209.10 and 61,143,937.72 is: 91,747,311.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,812,608.60 : 208,290,209.10 = 61,143,937.72 : x
  2. Step 2: Convert to fraction form
    138,812,608.60/208,290,209.10 = 61,143,937.72/x
  3. Step 3: Cross multiply
    138,812,608.60x = 208,290,209.10 × 61,143,937.72
  4. Step 4: Simplify right side
    138,812,608.60x = 12,735,683,572,896,176
  5. Step 5: Solve for x
    x = 12,735,683,572,896,176/138,812,608.60
  6. Step 6: Final answer
    x = 91,747,311.01

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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.