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Finding the Fourth Proportional to 85,824,502.80, 128,886,053.40 and 45,513,718.80

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Solution

The fourth proportional to 85,824,502.80, 128,886,053.40 and 45,513,718.80 is: 68,349,753.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,824,502.80 : 128,886,053.40 = 45,513,718.80 : x
  2. Step 2: Convert to fraction form
    85,824,502.80/128,886,053.40 = 45,513,718.80/x
  3. Step 3: Cross multiply
    85,824,502.80x = 128,886,053.40 × 45,513,718.80
  4. Step 4: Simplify right side
    85,824,502.80x = 5,866,083,591,689,384
  5. Step 5: Solve for x
    x = 5,866,083,591,689,384/85,824,502.80
  6. Step 6: Final answer
    x = 68,349,753.28

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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.