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Finding the Fourth Proportional to 98,569.86, 136,026.27 and 56,128.39

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Solution

The fourth proportional to 98,569.86, 136,026.27 and 56,128.39 is: 77,457.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,569.86 : 136,026.27 = 56,128.39 : x
  2. Step 2: Convert to fraction form
    98,569.86/136,026.27 = 56,128.39/x
  3. Step 3: Cross multiply
    98,569.86x = 136,026.27 × 56,128.39
  4. Step 4: Simplify right side
    98,569.86x = 7,634,935,532.81
  5. Step 5: Solve for x
    x = 7,634,935,532.81/98,569.86
  6. Step 6: Final answer
    x = 77,457.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.