Home / 85,774,089.60-128,661,134.40-71,161,430.40

Finding the Fourth Proportional to 85,774,089.60, 128,661,134.40 and 71,161,430.40

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Solution

The fourth proportional to 85,774,089.60, 128,661,134.40 and 71,161,430.40 is: 106,742,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,774,089.60 : 128,661,134.40 = 71,161,430.40 : x
  2. Step 2: Convert to fraction form
    85,774,089.60/128,661,134.40 = 71,161,430.40/x
  3. Step 3: Cross multiply
    85,774,089.60x = 128,661,134.40 × 71,161,430.40
  4. Step 4: Simplify right side
    85,774,089.60x = 9,155,710,360,790,646
  5. Step 5: Solve for x
    x = 9,155,710,360,790,646/85,774,089.60
  6. Step 6: Final answer
    x = 106,742,145.60

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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.