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Finding the Fourth Proportional to 93,043.98, 128,412.95 and 90,510.81

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Solution

The fourth proportional to 93,043.98, 128,412.95 and 90,510.81 is: 124,916.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,043.98 : 128,412.95 = 90,510.81 : x
  2. Step 2: Convert to fraction form
    93,043.98/128,412.95 = 90,510.81/x
  3. Step 3: Cross multiply
    93,043.98x = 128,412.95 × 90,510.81
  4. Step 4: Simplify right side
    93,043.98x = 11,622,759,666.44
  5. Step 5: Solve for x
    x = 11,622,759,666.44/93,043.98
  6. Step 6: Final answer
    x = 124,916.84

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1.5x scale

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.