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Finding the Fourth Proportional to 261,334,472.64, 392,005,865.64 and 145,486,165.72

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Solution

The fourth proportional to 261,334,472.64, 392,005,865.64 and 145,486,165.72 is: 218,231,562.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,334,472.64 : 392,005,865.64 = 145,486,165.72 : x
  2. Step 2: Convert to fraction form
    261,334,472.64/392,005,865.64 = 145,486,165.72/x
  3. Step 3: Cross multiply
    261,334,472.64x = 392,005,865.64 × 145,486,165.72
  4. Step 4: Simplify right side
    261,334,472.64x = 57,031,430,331,713,088
  5. Step 5: Solve for x
    x = 57,031,430,331,713,088/261,334,472.64
  6. Step 6: Final answer
    x = 218,231,562.62

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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.